AI4Car

Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Find codes by symptomChoose what you notice to search matching code guides.

Quick browse

Choose a vehicle system

All systems
FiltersSeverity · family

Vehicle coverage

These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 505–528 of 975

Most searched first
P2287Injector Control Pressure Sensor Circuit IntermittentCheck soonFuel SystemP2288Injector Control Pressure Too HighCheck soonFuel SystemP2289Injector Control Pressure Too High - Engine OffCheck soonFuel SystemP228AFuel Pressure Regulator A - Forced Engine ShutdownCheck soonFuel SystemP228BFuel Pressure Regulator B - Forced Engine ShutdownCheck soonFuel SystemP228CFuel Pressure Regulator A Exceeded Control Limits - Pressure Too LowCheck soonFuel SystemP228DFuel Pressure Regulator A Exceeded Control Limits - Pressure Too HighCheck soonFuel SystemP228EFuel Pressure Regulator A Exceeded Learning Limits - Too LowCheck soonFuel SystemP228FFuel Pressure Regulator A Exceeded Learning Limits - Too HighCheck soonFuel SystemP2290Injector Control Pressure Too LowCheck soonFuel SystemP2291Injector Control Pressure Too Low - Engine CrankingCheck soonFuel SystemP2292Injector Control Pressure ErraticCheck soonFuel SystemP2293Fuel Pressure Regulator B PerformanceCheck soonFuel SystemP2294Fuel Pressure Regulator B Control Circuit/OpenCheck soonFuel SystemP2295Fuel Pressure Regulator B Control Circuit LowCheck soonFuel SystemP2296Fuel Pressure Regulator B Control Circuit HighCheck soonFuel SystemP229AFuel Pressure Regulator B Exceeded Control Limits - Pressure Too LowCheck soonFuel SystemP229BFuel Pressure Regulator B Exceeded Control Limits - Pressure Too HighCheck soonFuel SystemP229CFuel Pressure Regulator B Exceeded Learning Limits - Too LowCheck soonFuel SystemP229DFuel Pressure Regulator B Exceeded Learning Limits - Too HighCheck soonFuel SystemP22D9Cylinder 1 Alternative Fuel Injector Control Circuit/OpenCheck soonFuel SystemP22DACylinder 1 Alternative Fuel Injector Control Circuit LowCheck soonFuel SystemP22DBCylinder 1 Alternative Fuel Injector Control Circuit HighCheck soonFuel SystemP22DCCylinder 1 Alternative Fuel Injector Control Circuit Range/PerformanceCheck soonFuel System