By make & model
Check engine light by vehicle
Engine codes don't mean the same thing on every car. These guides go year-by-year, generation-by-generation — including the issues your specific engine family is actually known for.
Toyota
5 guides covering the most common Toyota engine codes and model-specific issues.
- Toyota CamryXV30 → XV70 generations, 2AZ-FE oil consumption issue, 2AR-FE, A25A-FKS
- Toyota CorollaE140 / E170 / E210 generations
- Toyota RAV4XA30 → XA50, 2.5L A25A-FKS hybrid variants
- Toyota PriusGen 2/3/4 HV battery degradation, 1NZ-FXE, 2ZR-FXE
- Toyota P0420 on ToyotaMost Toyota-specific code in volume. Federal cat warranty (8yr/80k US).
Volkswagen
4 guides covering the most common Volkswagen engine codes and model-specific issues.
- Volkswagen JettaEA888 timing chain TSB, EA113, MQB platform
- Volkswagen GolfGTI-specific tuner concerns, Mk6/Mk7/Mk8 differences
- Volkswagen EPC light (VW/Audi)Throttle / brake light switch / pedal sensor. Brand-specific to VW Group.
- Volkswagen P0171 on VWEA888 PCV diaphragm, intake manifold cracks, fuel-trim analysis
Coming next
These vehicles are next in the by-vehicle expansion plan. Each will get the same generation-by-generation depth as the Toyota and VW guides.
- Honda Civic
- Honda Accord
- Honda CR-V
- Ford F-150
- Ford Focus
- Ford Escape
- Chevrolet Silverado
- Chevrolet Equinox
- Nissan Altima
- Nissan Rogue