C2657 Diagnostic Trouble Code

C2657 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 C2657 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code C2657 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 C2657.

Fortunately, C2657 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2657 Trouble Code For Specific Cars

C2657 Rickenbacker 8 HO2S Transition Time Ratio Sensor 1
C2657 Bmw Serie 1 Clutch Position Fault
C2657 Unipower 1275 Power Window LR Motor Circuit Failure
C2657 Mercedes Cla 45 ABS Outlet Valve Coil LF Circuit Failure
C2657 Daihatsu Naked Glow Plug Circuit High Input (Bank #2)
C2657 Maserati Bora Transmission Fluid Pressure Sensor/Switch C Circuit Low
C2657 Honda S2000 Rear Wiper Select Switch "B" Short to Ground