C0357 Diagnostic Trouble Code

C0357 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C0357 diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon acceleration
Engine surge

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code C0357 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C0357.

Fortunately, C0357 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0357 Trouble Code For Specific Cars

C0357 Smart Fortwo Iii Lamp Anti-Theft Indicator Circuit Open
C0357 American Roadster Air Suspension Height Sensor Power Circuit Short To Battery
C0357 Subaru H6 Left Rear Backup Lamp Circuit Short to Battery
C0357 Mercedes-benz 540 Air Bag Safing Sensor Output Circuit Short To Ground
C0357 Apperson 6 Air Suspension LR Air Compress Request Exceeded Max Timing
C0357 Lotus Exige S3 Traction Control Motor Potentiometer Circuit Failure
C0357 Cadillac V16 Disable Signal Output Circuit Short to Battery