Please fill the "Code Box" to find engine fault code.
All Engine Codes
|The all list of engine trouble codes.|
P0121 Engine Diagnostic Code
Another consequence of P0121 engine overheating may be a blown head gasket. Heat makes aluminum swell almost three times faster than cast iron. Thermal stress can distort the head and make it swell in areas that are hottest like those between exhaust valves in adjoining cylinders, and areas that have restricted coolant flow like the narrow area that separates the cylinders. The typical aluminum head swells most in the middle, which can crush the head gasket if the head gets too hot. This will usually cause the head gasket to leak compression between adjacent cylinders, or leak coolant into the cylinders.
P0121 engine code provides below are generic codes that may not apply to all vehicles. Car manufacturer uses specific P0121 DTC code that are different from the codes shown below. Foreign vehicles may also use DTC codes different from the generic Engine Diagnostic codes.
P0121 Diagnostic Trouble Code Meaning And Solution
|Powertrain Problem||SAE - Generic||Fuel And Air Metering||21 Engine Fault Code|
Starting letter P diagnostic code shows that there are problems in engine, transmission and emissions systems.
Don't forget ! If your P0121 engine code not resolved on and there are trouble codes in your computer, your vehicle will not pass an OBD 2 emissions test. The light must be off and there must be no codes in memory to pass an OBD 2 emissions test. In addition, all of the OBD II self-monitors that check for faults must have run and completed without finding any further problems to pass the test.