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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Throttle Body and Idle Control: OBD-II Diagnostics — P0120, P0506, P2135
How to diagnose the electronic throttle body (ETB) and idle control through OBD-II: P0120, P0122, P0506, P0507, P2135 codes — Live Data checks without workshop equipment.
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Timing Belt Replacement: OBD-II Indicators and Skip Symptoms
How OBD-II helps identify timing belt condition: P0016 camshaft correlation, P0300 misfires after a skip, Live Data confirmation — plus replacement intervals for common engines.
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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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Toyota Prius Hybrid Diagnostics via OBD-II: HV Battery, P0A80, EV Mode
Complete OBD-II diagnostics for Toyota Prius Gen 2/3/4: P0A80 HV battery degradation, P3190 engine in hybrid mode, cell voltage check, PCU inverter — practical guide.
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Turbocharger Boost Leak Diagnostics via OBD-II: P0299, P0234, Boost Live Data
How to detect boost leaks and turbocharger faults through OBD-II: P0299 underboost, P0234 overboost, Boost Pressure Live Data — systematic leak-finding algorithm without expensive equipment.
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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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