Every guide is written by iCarsoft engineers and checked against SAE J2012 — with ranked causes, real cases and the test that actually confirms the fault.
The first letter tells you the area, the first digit tells you generic (0) vs manufacturer-specific (1). Start here if you know your code's prefix.
Engine, transmission, fuel & emissions. The most common codes.
Brand-specific powertrain faults defined by the carmaker.
CAN-bus and module communication faults.
Extended generic emissions & injector codes.
Misfire, ignition & hybrid-specific codes.
Every code, listed in order, on one page.
Not sure of the code? Start from the part of the car that's acting up.
Manufacturer-specific codes and brand repair centers — what your make does differently.
The fault codes technicians and owners look up most this month.
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