On-board OBD-II diagnostics with cloud analytics, AI assistant and fleet support.
Check car compatibilityArticles on diagnostics, OBD-II and car maintenance
Lane Keep Assist, Adaptive Cruise Control, AEB via OBD-II: typical codes U0428, C1B01, why calibration is needed after windshield replacement, and why an OBD adapter won't do it.
The mechanical part of fitting a towbar is simple. The electrical part is not: a modern car has to "know" a trailer is attached, or the stability systems operate on the wrong rules.
A chip is exposed metal. How it turns into rust, what to do yourself, and where DIY ends.
Sudden fuel-use increase: which DTC codes and live parameters to watch, how to distinguish worn engine from a clogged filter.
Springs and wheels change more than the look. How suspension modification upsets ABS, stability control, and driver assistance calibration, and why codes appear without any physical fault.
An annual scan catches what has already happened. A schedule built around pending codes and events catches what is about to happen — and that is the difference between prevention and repair.
A door mirror contains three separate mechanisms that fail differently. How to separate motor, heater, and wiring.
Dash cams, alarms, seat heaters, and audio are the most common cause of electrical faults that then get hunted for weeks inside factory systems. How they cause damage and how to avoid it.
The car updates itself with no workshop visit — and behaves differently afterwards. What actually changes, why your adaptations disappear, and how to record the version before and after.
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.
What BCM does, how OBD-II reads B-codes and U-codes, why "the window is stuck from pause" is often the BCM, and how to tell the module from a wiring fault.
A tread wear pattern is free suspension and pressure diagnostics. Five typical patterns and what to do about each.
Before: shop wanted $400 to replace the catalytic converter.
After: scanned → P0420. Turned out to be a $15 oxygen sensor. Light stayed off.
Before: no idea whether it's the DPF, EGR or an injector. Shop suggested "full diagnostics" for $180.
After: P0401 — insufficient EGR flow. Cleaned the valve at home, power returned.
Before: a new battery didn't help. Electrician muttered about "wiring issues".
After: U0140 — lost communication with BCM. Corroded terminals; cleaned them, problem solved.
Before: mechanic suggested a full engine overhaul. Vibration at idle, no clear cause.
After: P0303 — misfire on cylinder 3. Replaced one spark plug for $4. Idle smooth again.
Before: replaced filters, O2 sensor, injectors — nothing helped. Burning 14 L/100 km.
After: P0171 — lean mixture, MAF out of range. Cleaned the sensor — dropped to 8 L/100 km.
Before: shop quoted a $900 transmission rebuild. Symptoms: jolts during acceleration.
After: P0715 — turbine speed sensor. $35 part, 30-minute job. Jerking gone completely.
Before: replaced the radiator and coolant — temperature still crept up on long drives.
After: P0128 — thermostat stuck open. $18 replacement fixed it; temp stays normal.
Before: mechanics shrugged. One suggested replacing the fuel tank — $400.
After: P0456 — small EVAP leak. A cracked $6 nipple was the culprit. Smell gone.
Before: brakes checked twice — everything fine. ABS still kicked in randomly.
After: C0035 — front left wheel speed sensor faulty. $22 replacement, no more false ABS.
Before: cranked fine but no start every rainy day. New plugs and coil did not help.
After: P0335 — crankshaft position sensor with damaged insulation. $28 fix, starts every time.
Before: tuning shop offered an ECU remap for $220. Power fell off sharply at 3000 rpm.
After: P0101 — MAF out of range. $45 sensor swap. Acceleration became smooth and strong.
Before: recharged refrigerant 3 times in one summer — $120 wasted, lasted a week each time.
After: P0530 — AC pressure sensor faulty. $16 part, no more leak, cold air all summer.
Sample scenarios based on common cases — real customer quotes will appear once we collect publication consent.
Enter the DTC and find out what it means, how severe it is and what causes it.
View all 150 popular codesYou own the car and want to know what "Check Engine" means before the shop. Quick sessions from the phone, per-car history, plain-language AI explanations.
Personal tierYou own or work in a small garage. Web panel with concurrent sessions, branded PDF reports for customers, DTC library with explanations.
Pro tierYou run 10 to 500+ vehicles. Roles and permissions, automatic alerts on critical DTCs, cross-vehicle comparison, exportable reports.
Fleet tierWhy the light came on, how serious it is, and what to do next — no jargon.
RPM, coolant temp, MAF, throttle — in real time, like a factory service manual.
Describe the symptom — the model cross-checks ECU data and suggests the likely cause.
Estimate for a single-car driver who deals with 2–3 unexplained warnings a year. Your savings depend on how often things go wrong.
OBD-II is mandatory on passenger cars (USA since 1996, EU since 2001) and on light commercial vehicles (since 2005).
You need an ELM327-based OBD-II adapter (Bluetooth Classic SPP) — from $10–15. Pair and start a session.
Your car may use a non-standard OBD-II variant. Try it — the app auto-detects the protocol (ISO 15765, KWP2000, ISO 9141).
Before 1996 (US) / 2001 (EU) cars used OBD-I with a different connector and protocol. OBD-I is not supported.
DTC P0301 confirmed, live data shows a +12% Long-Term Fuel Trim spike on cylinder 1, brief misfires under load.
Most likely cause — cylinder 1 ignition coil (44%), then spark plug (28%). Injector — 15%, compression — 10%. Recommendation: swap the coil first; the AI predicts P0301 will clear within 3 cold starts.
Coil ~$45, 20-min DIY or ~$30 labour at a shop. Vs. a $150 scan-and-guess shop diagnostic — getting the right part first saves time and money.
Illustrative example — real findings depend on your car.
Approximately 145,000 DTC codes with expert descriptions, stored server-side — never bundled into the mobile app. The AI is grounded in this data rather than answering from general training knowledge.
A dedicated retrieval service backed by a vector database with text embeddings. Relevant technical material is retrieved and injected into the model context before it answers — the model does not answer from its general training knowledge alone.
A large commercial language model accessed through a model-routing abstraction layer, so the provider can be swapped without altering the diagnostic pipeline.
The mobile app is an Apache Cordova shell with a React UI layer. The diagnostic session is server-owned: the phone acts as a transparent proxy, not the decision-maker. Logic lives once, server-side — auditable and upgradable without an app-store release cycle.
We read parameters and DTCs (Mode 01, 03, 09) — passive queries only. Writing to the ECU only happens with explicit consent and a risk disclosure.
When a code points to pressurized fuel systems, brakes or airbags, the AI plainly says "go to a shop" — instead of pushing DIY to keep you subscribed.
No "3 seats left" or "special price today". The tier price is the same tomorrow as it is now.
Yes, an OBD-II adapter on the ELM327 chip (Bluetooth Classic SPP) — starts around $10. We do not sell adapters, but we maintain a compatibility list in the docs.
All cars and light commercial vehicles with an OBD-II port — mandatory since 1996 in the US, 2001 in the EU. Heavy trucks on J1939 are on the roadmap.
Reading data (Mode 01, 03, 09) is fully safe — passive queries only. Clearing DTCs (Mode 04) is safe but requires explicit confirmation. We do not perform write operations without certification.
