By make and model
Faults, quirks and code patterns specific to one manufacturer. ← Browse sections
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Audi Q3 and A5: shared VAG hardware, specific complaints
Two different body styles on the same group engines and gearboxes. Almost nothing on the fault list is exclusive to Audi, which makes documentation easy to find.
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BMW B47 and B48: the modular generation and what it actually breaks
BMW rebuilt its engine range around a common 500cc cylinder module. The result addressed the previous generation problems and introduced a shorter list of its own.
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BMW F30 3 Series: OBD diagnostics and the known weak points
The F30 generation is well documented, which makes it easy to diagnose and easy to check before buying. Three items dominate the fault list.
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BMW N20 and N26: timing chain, oil filter housing and boost
A well-regarded engine with one documented failure that determines whether a used example is a bargain or a liability. The check takes thirty seconds.
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Chery Tiggo: the platform under several badges
The Tiggo underpins Omoda, Jaecoo and others. Knowing that means the documentation you need may be under a different name.
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Citroen C3 and C5 Aircross: the same engines, different priorities
Stellantis engines in Citroen bodies. The mechanical checks are shared with Peugeot; the suspension and comfort systems are where they differ.
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Fiat 500 and Panda: TwinAir, Dualogic and the small-car realities
Two shared-platform city cars with one unusual engine and one automated gearbox that generates most of the complaints.
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Ford Fiesta: common OBD faults across the EcoBoost years
One question dominates a used Fiesta purchase, and it is about a belt that runs in engine oil. Everything else is secondary.
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Ford Ranger: diesel pickup diagnostics for a working vehicle
Bought to tow and carry, and often used for neither. That mismatch produces most of what goes wrong, and it is visible in two readings.
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Geely Coolray and Atlas: turbo DI diagnostics on a newer brand
Geely engineering sits behind several familiar badges. The engines read normally on generic OBD-II, which is the practical starting point.
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Honda Jazz and HR-V: CVT care and VTEC oil dependence
Two well-built cars where almost everything that goes wrong traces to one of two fluids. Both are checkable before they become expensive.
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Hyundai i30 and i20: European Hyundais and their fault patterns
Designed and built largely for Europe, with the group engine range. Knowing which engine you have matters more here than the badge on the boot.
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Hyundai Ioniq 5 and Kia EV6: E-GMP diagnostics for owners
A dedicated 800 V electric platform. Almost nothing OBD-II was designed to read exists here, so knowing what does matter is the whole skill.
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Iveco Daily: van diagnostics where the load never stops
A ladder-chassis van built for real payloads, which means its faults come from work rather than from age. Two readings predict most of them.
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Kia Picanto and Stonic: small Kias and the checks that pay
Two of the more dependable small cars available, where the useful diagnostic work is mostly confirmation rather than investigation.
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Mazda 3 and CX-30: SkyActiv-X, mild hybrid and knock behaviour
Mazda went the opposite way from everyone else on engine design. That produces a genuinely different fault profile, and one reading matters more than usual.
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Mercedes OM651: injectors, timing chain and the delete myth
The four-cylinder diesel in half the Mercedes range for a decade. Two documented issues dominate, and one of them is measurable before it becomes a symptom.
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Mercedes W204 and W205 C-Class: the fault list by generation
Two generations of the same car with different engines, different electronics and different weak points. Knowing which you are looking at matters.
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MG ZS and HS: what OBD reads on the reborn badge
A British badge on SAIC engineering. Generic OBD-II reads them normally, which matters because independent workshop familiarity is still building.
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Mitsubishi Outlander and ASX: CVT, PHEV and the shared platform
Two models, three drivetrain types, and a plug-in hybrid that behaves differently from anything else in the range.
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Nissan Note and Micra: small Nissans, CVT questions included
Later Micras share Renault engineering and earlier ones do not. Both eras raise the same question about the automatic gearbox.
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Opel Zafira and Meriva: family MPVs and their recurring faults
GM-era engines, family-car mileage patterns, and two specific items that appear in almost every used-buying discussion.
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Peugeot 208 and 2008: PureTech wet belt and what else to check
One question determines whether a used PureTech is a good buy. Everything else on the list is ordinary by comparison.
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Renault 1.5 dCi: the engine in half of Europe, and its four weak points
One of the most produced diesel engines ever made, in Renaults, Nissans, Dacias and Mercedes. Four items account for most of what goes wrong.
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Renault Captur and Scenic: the electrical and emissions picture
Shared Renault engines and a reputation for electrical faults that mostly traces back to one thing worth checking before anything else.
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Renault Master and Peugeot Boxer: large van OBD diagnostics
Two large panel vans that between them carry most of Europe. Their fault lists come from the work they do, not from where they were built.
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SEAT Ibiza and Arona: the small VAG platform in detail
Mechanically a Polo and a T-Cross with different bodywork. That is genuinely useful — every fault is already documented somewhere else in the group.
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Skoda Scala and Yeti: two eras of the same engineering
The Yeti belongs to an earlier VAG generation and the Scala to the current one. Same group hardware, different specific concerns.
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Smart alternators: why your voltage swings and that is correct
Charging voltage that drops to 12.5 V under acceleration and jumps to 15 V on the overrun looks like a fault. On a modern car it is the design working.
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Suzuki Jimny and SX4: simple hardware, specific checks
Mechanically straightforward vehicles where most of the maintenance value is in drivetrain oils that nobody changes.
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Volvo XC40 and S60: module density and what generic OBD reaches
Volvo builds safety systems into almost everything, which means many modules and a lot that a generic scan cannot see. Knowing the boundary helps.
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VW Crafter and Mercedes Vito: two working vans compared
Different manufacturers, near-identical fault lists. On a working diesel van, what breaks is determined by use rather than by badge.
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VW Polo: OBD diagnostics across the small-engine generations
Small VAG engines, big VAG documentation. The Polo shares almost everything with the Fabia and Ibiza, which makes its fault list easy to research.
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Alfa Romeo Giulia and Stelvio: OBD diagnostics beyond the stereotype
The Giorgio platform cars are better built than the reputation suggests, but they are electrically dense and battery-sensitive. Most reported gremlins trace to one cause.
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Audi A6 and A8: OBD diagnostics on the big platforms
Large Audis carry more modules than most cars have components. That changes what a scan means: the full code set across modules matters more than any single code.
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BMW 1 Series F20: common faults an OBD scan reveals
The F20 shares its engines with most of the BMW range, which means its recurring faults are thoroughly documented. The timing chain question dominates any used purchase.
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Cadillac, Buick and GMC: common OBD-II codes across the GM range
Three badges, one parts bin. The recurring codes across GM North American models are shared, and so are the fixes — which makes the diagnostic shortlist unusually transferable.
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Citroen C4 and Berlingo: OBD diagnostics on PSA platforms
Two PSA staples running the same engines as half of France. The wet timing belt on petrol models and the additive-dosed diesel system are the two things to understand.
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Dacia Sandero and Duster: OBD diagnostics on a budget platform
Dacia runs proven Renault mechanicals with the complexity removed. That makes faults predictable and parts cheap — and it makes the few known weak points worth knowing about.
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Dodge and Ram: common OBD-II codes and Chrysler-family quirks
Dodge and Ram share modules and wiring conventions with the wider Chrysler group, including one architectural quirk that explains a whole class of confusing electrical faults.
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Fiat Ducato: OBD diagnostics on Europe’s most common motorhome base
The Ducato serves two very different lives — daily delivery van and motorhome that sits for months. Each produces its own fault set, and the standing one surprises people.
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Ford Transit: OBD diagnostics for a working van
A van that stops working costs money by the hour, which changes the diagnostic priority from curiosity to prediction. Three readings forecast most Transit downtime.
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Genesis, Infiniti and Acura: OBD on the premium Asian brands
Three premium badges built on Hyundai, Nissan and Honda foundations. The mainstream mechanical documentation applies directly — the premium layer is what needs different tools.
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Haval and Great Wall: OBD diagnostics on Chinese SUVs
These read fine on generic OBD-II, and that matters more than usual: independent workshop familiarity is thin, so owner-side data does more work here than on established brands.
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Honda Civic and Accord: common OBD faults by generation
Honda engines are famously durable, so the recurring faults cluster around the systems bolted to them — VTEC oil pressure, catalyst efficiency and, on turbo models, oil dilution.
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Hyundai Tucson and Santa Fe: OBD diagnostics on the SUV range
Hyundai SUVs share engines and modules with Kia, so the fault list transfers directly. The GDI engines have a documented history worth understanding before buying.
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Isuzu D-Max and SsangYong/KGM: diesel OBD diagnostics
Working diesels bought for towing and load carrying. The emissions hardware is the recurring cost, and the drivetrain oils are the recurring omission.
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Jaguar XE and XF: OBD diagnostics and the JLR electrical reputation
The reputation for electrical gremlins is largely one root cause wearing many costumes. Fix the supply and a surprising number of unrelated-looking faults disappear together.
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Kia Ceed and Sorento: what an OBD scan finds first
A compact hatchback and a large SUV sharing a parts bin with Hyundai. The Ceed fails around ignition and mixture; the Sorento adds diesel emissions hardware and drivetrain oils.
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Lada Vesta and Granta: OBD-II support and common codes
Modern Ladas are fully OBD-II compliant and read with any standard adapter. The engines are simple, which makes the recurring fault list short and mostly cheap.
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Mazda CX-5: SkyActiv OBD diagnostics in practice
SkyActiv engines took a different path from the rest of the industry, and their fault list reflects that. The diesel in particular fails in ways other diesels do not.
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Mercedes GLA and GLC: OBD diagnostics on the compact SUVs
Two Mercedes SUVs on different platforms with different fault sets. The GLA borrows from the A-Class; the GLC from the C-Class — and that determines what goes wrong.
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MINI Cooper: common OBD faults on the BMW-based platform
A MINI is a BMW underneath, and it inherits the timing chain, carbon and cooling issues to match. The fault list is well documented — which means the warning signs are too.
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Nissan X-Trail: OBD diagnostics and the CVT question
The engine is rarely the problem on an X-Trail. The continuously variable transmission is where the risk and the money are, and it announces itself early if you know what to log.
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Omoda, Jaecoo and Jetour: what OBD-II reads on the new Chinese brands
These are new badges on established Chery platforms. Generic OBD-II reads them normally, which is the practical starting point when the workshop network is still forming.
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Opel Corsa and Insignia: common OBD faults
Two Opels from different eras and different parents. Which platform yours sits on — GM or PSA — determines the entire fault list, so establish that first.
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Renault Kangoo and Trafic: van OBD diagnostics
Two of the most common working vans in Europe, both running well-documented Renault diesels. The fault list is short, predictable and mostly preventable.
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SEAT Leon and Ateca: OBD diagnostics and VAG shared parts
Mechanically these are Golfs and Tiguans with different bodywork, which means every fault is already documented under another badge. Here is what transfers and what does not.
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Skoda Kodiaq and Karoq: OBD diagnostics on VAG SUVs
Skoda SUVs run VAG engines and gearboxes, so the fault list is shared with Volkswagen and Audi. That is useful — everything is already documented somewhere.
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Smart Fortwo: OBD diagnostics on a very small car
A rear-engined city car with an automated manual gearbox has a fault list unlike anything else on the road. The gearbox is where most of the money goes.
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Subaru Outback: OBD diagnostics on the boxer platform
A horizontally opposed engine and permanent four-wheel drive give the Outback a fault list nobody else shares — including one tyre rule that can destroy a transmission.
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Suzuki: common OBD-II codes and where they come from
Suzuki engines are simple by modern standards, which makes their fault patterns predictable. Here are the codes that recur and what each usually turns out to be.
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Suzuki Swift and Vitara: the faults an OBD scan finds first
Two very different Suzukis sharing an engineering philosophy. The Swift fails predictably around ignition and idle; the Vitara adds a drivetrain worth checking separately.
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Toyota Land Cruiser and Prado: OBD diagnostics on a long-life SUV
These are bought to last two decades, which changes what matters. The engine rarely lets you down; the drivetrain oils and the emissions hardware are where attention pays.
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Volvo XC60 and XC90: OBD diagnostics and module coverage
Volvo builds safety systems into almost everything, which means many modules and many things that can go quiet. The generic scan reaches less here than owners expect.
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VW Tiguan and Touareg: common OBD faults on VAG SUVs
Two VW SUVs at opposite ends of the range. The Tiguan inherits the mainstream VAG fault list; the Touareg adds air suspension and a complexity level that changes the calculus.
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Heated seats: why they stop working and what to do
The heating element breaks from flexing rather than from age. The causes, the repair, and why not to ignore it.
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Seat belts: buckles, pretensioners, and the lamp you cannot ignore
The belt, not the airbag, is the primary restraint. The faults, the pretensioners, and why an SRS lamp disables the whole system.
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Audi A4 B7 and B8: oil consumption, chain, and carbon — three topics to check together
The three main topics of these generations are causally linked: oil reaches the chamber, carbon settles on the valves, the chain stretches. So check them together rather than one at a time.
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BMW E90: what to check by engine version, and why the diesel is its own story
On the E90 the cost of ownership is decided not by the body or the mileage but by which engine is under the bonnet. A breakdown by version, and why a cold start on a diesel is critical.
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Lanos: seven typical faults and why diagnostics pays off fastest here
A simple engine, cheap parts, and age — a combination where most faults can be found yourself. The typical Lanos codes, and why an adapter pays for itself on the first avoided workshop visit.
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Hyundai Accent: common Gamma engine faults and what to check when buying
The Accent is a car whose faults are predictable and inexpensive. The most frequent codes, why the cam phaser here suffers from oil, and what to check past 90,000 miles.
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Kia Rio: what fails at which mileage — a schedule rather than a list
The Rio shares its engine family with the Hyundai Accent, so the parts list is common to both. The difference is when each item appears — and that schedule is more useful than the list itself.
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Mazda 6: intake valve carbon, cam timing, and why short trips hurt here
Direct-injection engines deliver high efficiency and one characteristic problem — carbon on the intake valves that fuel never washes off. What diagnostics can see of it.
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Mercedes Sprinter: commercial vehicle faults, where downtime costs money
On a commercial vehicle diagnostics has different economics: one day off the road costs more than the adapter. Typical Sprinter faults, and which of them can be caught before the van stops.
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Nissan Almera: simple faults on a simple car, and where the fuel consumption hides
The Almera was deliberately built simple, and that shows in its fault list: almost everything is found with a basic adapter. The most frequent codes, and why consumption rises with no lamp at all.
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Opel Astra H: chain, thermostat, and steering assist — three topics that set the cost of ownership
The Astra H has a short and very predictable problem list. Three items are worth checking before you buy, because they determine what the car will cost to run.
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Renault Duster: common faults on petrol and diesel versions
The Duster is bought for simplicity, and that simplicity pays off — most faults here fall into the "find it and replace it yourself" category. Broken down by engine version, plus what four-wheel-drive owners should check.
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Skoda Fabia: faults by engine version — from the three-cylinder to the diesel
The Fabia was built with very different engines, and their problem lists barely overlap. A breakdown by version, so you do not go hunting somebody else's faults on your own car.
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Toyota RAV4: oil consumption, cam phasers, and what to check past 90,000 miles
The RAV4 has a reputation for reliability and it is earned — but two topics repeat across generations. What diagnostics can see, and what still has to be checked on the dipstick.
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VW Passat B6 and B7: what fails with mileage and what to check when buying
The TSI timing chain, TDI swirl flaps, the DSG mechatronic unit, and oil consumption — four topics that account for most Passat conversations of these generations. What diagnostics can see of each.
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Audi Common OBD-II Codes: A3, A4, A6, Q5, TT
Top DTC codes for Audi A3, A4, A6, Q5, TT: TFSI EA888 common issues, S-tronic DSG problems, quattro driveline codes, VAG UDS extended diagnostics — OBD-II guide.
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Audi Q7 and Q5 OBD-II Diagnostics: 3.0 TDI V6, 3.0 TFSI, S-tronic, Air Suspension
DTC codes for Audi Q7 4L/4M and Q5 8R/FY: 3.0 TDI V6 CP4 P0087, 3.0 TFSI supercharger P0299, S-tronic DL501 P0715, Audi Air Suspension C1141 — OBD-II Live Data and diagnosis.
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BMW X5 and X3 OBD-II Diagnostics: N47 Chain, N57 Diesel, N55 VANOS, ZF 8HP
DTC codes for BMW X5 E70/F15 and X3 E83/F25: N47 timing chain P0016, N57 CP4 P0087, N55 VANOS P0011, ZF 8HP P0894, xDrive P175F — OBD-II Live Data without BMW ISTA.
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BMW N47 2.0d OBD Diagnostics: Most Common Faults on 1/3/5 Series, X1, X3
BMW N47 diesel diagnostics: P0087 fuel rail pressure, P2002 DPF, P0299 turbo, timing chain failure — OBD-II guide for BMW 116d, 118d, 320d, 520d, X1 20d.
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Chevrolet and GM Common OBD-II Codes: Cruze 1.4T, Lacetti 1.6, Captiva 2.0 CDTi
Top DTC codes for Chevrolet Cruze J300, Lacetti, Aveo T250, Captiva: 1.4T A14NET carbon buildup, 1.6 Z16XE chain, 2.0 CDTi Z20DMH EGR — OBD-II guide for GM group vehicles.
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Fiat and Alfa Romeo Common OBD-II Codes: 500, Punto, Giulia, Stelvio
Top DTC codes for Fiat 500, Punto, Bravo and Alfa Romeo Giulia, Stelvio: MultiAir timing chain, P0299 turbo, JTDM diesel, TwinAir — OBD-II diagnostics guide.
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Ford Focus and Mondeo Common OBD-II Codes: EcoBoost and TDCi
Top DTC codes for Ford Focus III/IV, Mondeo V: EcoBoost 1.0/1.5 misfires, TDCi 2.0 diesel, PowerShift DCT shudder — IDS-compatible OBD-II diagnostics guide.
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Honda Common OBD-II Codes: Civic, CR-V, Accord, Jazz
Top DTC codes for Honda Civic, CR-V, Accord, Jazz/Fit: P0341 i-VTEC cam sensor, P0401 EGR, CVT issues, VTEC solenoid — OBD-II diagnostics guide.
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Honda CR-V and SUVs OBD-II Diagnostics: K20/K24 i-VTEC, 1.5T, i-MMD Hybrid
DTC codes for Honda CR-V III/IV/V, HR-V, Pilot: K24 i-VTEC P2646, 1.5T L15B carbon buildup, i-MMD hybrid P0A80, CVT P0868 — Live Data and OBD-II analysis without dealer tools.
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Jeep and Chrysler Common OBD-II Codes: Cherokee, Renegade, Wrangler
Top DTC codes for Jeep Cherokee, Renegade, Wrangler and Chrysler: P0305 MultiAir misfires, P0522 oil pressure, U0100 CAN bus — OBD-II diagnostics guide.
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Kia and Hyundai Common OBD-II Codes: Sportage, Tucson, i30, Ceed
Top DTC codes for Kia Sportage, Ceed, Hyundai Tucson, i30: Theta II engine failures, GDI direct injection carbon buildup, DCT wet clutch, P0011 CVVT — OBD-II diagnostics.
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Kia Sportage and Hyundai Tucson OBD-II Diagnostics: 1.6 GDI, 2.0 CRDi, DCT, TPMS
DTC codes for Kia Sportage QL/NQ5 and Hyundai Tucson TL/NX4: 1.6 GDI carbon P2187, 2.0 CRDi D4HA EGR P0401, 7-speed DCT P0894, TPMS C0051 — OBD-II without dealer Gen3 scanner.
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Land Rover and Range Rover OBD-II Diagnostics: TDV6/TDV8, 2.0 Si4, EAS Air Suspension
Top DTC codes for Land Rover Discovery/Defender and Range Rover: TDV6 P0087, TDV8 chain, EAS air suspension faults, Haldex 4WD, JLR-specific OBD-II diagnostics.
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Mazda Common OBD-II Codes: CX-5, Mazda3, Mazda6, MX-5
Top DTC codes for Mazda CX-5, Mazda3, Mazda6, MX-5: SkyActiv-G direct injection issues, P0302 PCV misfires, i-Stop codes, GVC chassis codes — OBD-II diagnostics.
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Mercedes-Benz Engine OBD Diagnostics: C-Class, E-Class, GLC, Sprinter
OBD-II diagnostics for Mercedes-Benz C-Class, E-Class, GLC, Sprinter: M274 turbo petrol codes, OM651 diesel issues, 7G-Tronic problems, AIRMATIC suspension — guide.
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Mercedes C-Class and E-Class OBD-II Diagnostics: OM651, M271, 7G-Tronic, AIRMATIC
DTC codes for Mercedes W204/W212: OM651 2.2 CDI P0087 rail pressure, M271 CGI chain P0014, 7G-Tronic P0741, AIRMATIC air suspension C1141 — OBD-II Live Data without Star Diagnosis.
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Mitsubishi Common OBD-II Codes: Outlander, ASX, Eclipse Cross, L200
Top DTC codes for Mitsubishi Outlander, ASX, Eclipse Cross, L200: 4B11/4B12 MIVEC codes, CVT JF011E problems, PHEV battery codes, 4WD Super Select — OBD-II guide.
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Nissan Common OBD-II Codes: Qashqai, X-Trail, Micra, Leaf
Top DTC codes for Nissan Qashqai, X-Trail, Juke, Micra, Leaf: CVT Jatco issues, HR16/MR20 timing chain, P0420 catalyst, ProPilot ADAS — OBD-II diagnostics.
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Nissan Qashqai and Juke OBD-II Diagnostics: MR20, HR16 DIG-T, K9K dCi, CVT
DTC codes for Nissan Qashqai J10/J11 and Juke: MR20 CVTC P0011, 1.2 DIG-T P0299, K9K 1.5 dCi P0087, Jatco CVT P0868/P1778 — OBD-II Live Data without CONSULT III.
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Opel and Vauxhall Common OBD-II Codes: Astra, Insignia, Corsa, Mokka
Top DTC codes for Opel/Vauxhall Astra, Insignia, Corsa, Mokka: 1.6T A16LET issues, Z20NET ECOTEC faults, Intellilink connectivity codes, FlexRide — OBD-II guide.
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Peugeot and Citroën Common OBD-II Codes: 308, 508, C4, C5
Top DTC codes for Peugeot 308, 508, Citroën C4, C5: EP6 THP common faults, EGS robotised gearbox, AdBlue BlueHDI — OBD-II diagnostics guide.
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Porsche Cayenne and Panamera OBD-II Diagnostics: 3.6 V6, 4.8 V8, PDK, PASM
DTC codes for Porsche Cayenne 958 and Panamera 970/971: 3.6 V6 P0128, 4.8 Biturbo P0300, PDK P0894, PASM air suspension C1A25 — Live Data and OBD-II without PIWIS tester.
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Renault Megane and Clio — Common OBD-II Codes: 1.2 TCe, 1.5 dCi, EDC
Top DTC codes for Renault Megane III/IV and Clio IV/V: H4Bt 1.2 TCe timing chain, 1.5 dCi K9K fuel pump, EGR, EDC dual-clutch gearbox — OBD-II diagnostics guide.
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SEAT and Cupra Common OBD-II Codes: Ibiza, Leon, Cupra Formentor
Top DTC codes for SEAT Ibiza, Leon, Cupra Formentor: EA211 1.0/1.5 TSI misfires, DSG DQ200/DQ381 problems, P0299 turbo, VAG extended diagnostics — OBD-II guide.
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Skoda Octavia and Superb — Common OBD-II Codes: 1.4 TSI, 1.6 TDI, 2.0 TDI
Top DTC codes for Skoda Octavia III/IV, Superb III: EA211 1.4 TSI timing chain, TDI 1.6/2.0 EGR, DSG DQ250 wet clutch, VAG-specific OBD-II diagnostics.
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Subaru EJ Engine OBD Diagnostics: Outback, Forester, Impreza, WRX
OBD-II diagnostics for Subaru EJ20/EJ25 boxer engines: P0301 head gasket misfires, P0420/P0430 cats, STI flat-six knock detection, AWD DCCDcodes — complete guide.
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Subaru Impreza and Forester OBD-II Diagnostics: EJ20/EJ25, WRX P0299, HGF, AVCS
DTC codes for Subaru EJ20/EJ25 Boxer: head gasket failure P0301–P0304, WRX EJ257 P0299 underboost, AVCS P0011, FB20/FA20 GDI carbon — OBD-II Live Data without SSM Select Monitor.
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Toyota Corolla and Camry — Common OBD-II Issues: 2ZR, M20A D-4ST, VVT-iE, TPMS
Top DTC codes for Toyota Corolla E210 and Camry XV70: 2ZR-FE/FAE naturally aspirated, 2.0 M20A-FKS D-4ST, Atkinson VVT-iE hybrid, TPMS sensor codes — OBD-II without dealer tools.
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Toyota Hilux and Pickup Trucks: OBD-II Diagnostics — 2.4/2.8 Diesel, 4WD, P0087, InjBalance
DTC codes for Toyota Hilux (GUN125/GUN126) and Land Cruiser Prado: 2GD-FTV diesel P0087, VNT turbo P0299, 4WD transfer case C1201, InjBalance Live Data — diagnosis without dealer tools.
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VW Golf Common OBD-II Issues: Golf 6, Golf 7, GTI, GTE
Top DTC codes for VW Golf VI/VII: P2187 EA888 lean mixture, P0299 TSI turbo underboost, P0420 catalyst, DSG DQ200 shudder — OBD-II diagnostics and fixes.
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Volvo Common OBD-II Codes: XC60, V60, S60, XC90
Top DTC codes for Volvo XC60, V60, S60, XC90: Drive-E T5/T6 turbo issues, D4/D5 diesel common faults, Geartronic 8HP, Pilot Assist ADAS codes — OBD-II guide.
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Ford EcoBoost 1.5 / 2.0: typical OBD codes every Ford mechanic knows
Ford EcoBoost turbocharged specifics: P0299 turbo, P0301 misfire, P0016 timing chain, P0087 fuel pressure — real problem statistics for this engine family.
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OBD-II on Chinese cars: Chery, Geely, BYD, Great Wall — diagnostic specifics
What OBD-II can do on Chery Tiggo, Geely Coolray, BYD Tang, Great Wall Haval: SAE J1979 standard, custom PIDs, GB codes, brand tools vs universal ELM327.
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Manufacturer coding: how to activate "hidden" features on VAG, BMW and Mercedes via OBD
What long coding on VAG (VCDS) is, byte coding on BMW (ISTA/E-Sys), Xentry SCN on Mercedes. Which features you can legally enable, risks, and how not to "brick" an ECU.
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OBD-II on motorcycles: BMW Motorrad, Harley, Yamaha — where the standard port lives and where it doesn't
What OBD-II can do on a bike: BMW Motorrad K1600 (16-pin OBD), Harley-Davidson (4-pin DDL), Yamaha K-Line, Ducati, KTM. Which adapters and specific codes are available.
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OBD on trucks: SAE J1939, Volvo/Scania/DAF/MAN — standard and specifics
How to diagnose a truck via OBD: J1939 vs OBD-II, SPN/FMI codes, difference between light and heavy commercial vehicles, which adapters support J1939.
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VAG long coding cheatsheet: 15 popular codings for VW, Audi, Skoda via VCDS/OBDeleven
Ready-made VAG long coding cheatsheet (VW Golf, Audi A4, Skoda Octavia): activate cornering lights, comfort blinker, auto-lock, DRL, video-in-motion — bytes + bit positions.
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Common Ford Faults: Focus, Fiesta, Kuga, Mondeo — DTC Codes and Repair
Catalogue of common Ford Focus, Fiesta, Kuga, Mondeo, Escape faults: EcoBoost turbo engines, PowerShift DCT, Duratec, TDCi diesels.
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Common Mercedes-Benz Faults: W204, W205, W211, W212 — DTC Codes
Catalogue of common Mercedes C-Class, E-Class, GLK, GLC faults: OM651 diesel, M271/M276 petrol, 7G-Tronic, AirMatic.
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Common BMW Faults: E90, F30, G20 — DTC Codes and Repair
Catalogue of common faults on BMW 3-Series (E90, F30, G20) and 5-Series (E60, F10, G30): VANOS, timing chain, HPFP, DPF, injectors, electronics.
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Common Renault Faults: Megane, Duster, Logan — DTC Codes and Repair
Catalogue of common Renault Megane, Duster, Logan, Sandero, Captur faults: EGR, DPF, 1.5 dCi injectors, TCe turbo, UCH electronics.
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Common Skoda Faults: Octavia, Fabia, Yeti — DTC Codes and Repair
Catalogue of common Skoda Octavia A5/A7, Fabia, Yeti, Superb faults: TSI engines, DPF, DSG, EPC, VAG platform shared with Volkswagen.
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Common Volkswagen Faults: Top 20 DTC Codes and Typical Problems
Catalogue of typical VW Golf, Passat, Polo, Tiguan faults: EPC, ABS, DPF, EGR, ignition coils, TSI engines. With DTC codes, symptoms and repair.
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Audi A3 Brake Light Warning: What the Brake Indicators Mean
Detailed guide to Audi A3 brake warning lights: red brake symbol, yellow brake pad wear indicator, common faults like wheel-speed sensor failure, and step-by-step diagnostic advice.
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BMW 5 Series Warning Lights: Meaning and Common Faults Explained
A practical guide to BMW 5 Series dashboard warning lights across E60, F10, and G30 generations: colour meanings, how to respond, and the most common faults behind each indicator.
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Peugeot 308 Dashboard Warning Lights: Complete Guide to All 16 Signals
Complete reference guide to the 16 dashboard warning lights on a Peugeot 308: colour coding, what each signal means, and the exact action you should take — from the red STOP light to the amber low-fuel indicator.