C0121 Subaru Svx DTC Code

Subaru Svx Engine Specifications:

Engine Type :	Single Cylinder Engine
Cylinder Type :	Opposite Piston Engine
Engine Air Intake Process :	Naturally Aspirated

Your Subaru Svx engine control system detects a problem, the computer stores the diagnostic trouble code C0121 in its memory. To figure out what is wrong with your vehicle you must first extract the C0121 DTC For Subaru Svx.

Another consequence of C0121 Subaru Svx 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.

C0121 Subaru Svx DTC Meaning

C	Chassis Code - Problem is controller area network wiring bus and modules.
0	SAE - Generic
1	Fuel And Air Metering
2	Cruise Control Servo Indicates Low
1	PCM Stack Overrun

If your vehicle failed a C0121 Subaru Svx test and the C0121 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses C0121 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look C0121 DTC For Subaru Svx: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.