C2738 Diagnostic Trouble Code

C2738 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 C2738 diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Some aftermarket accessories and performance modifications

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code C2738 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 C2738.

Fortunately, C2738 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2738 Trouble Code For Specific Cars

C2738 Ferrari 125 Injector Circuit Open / Shorted - Cylinder #5
C2738 Tvr 1300 Persistent Misfire
C2738 Oldsmobile Trofeo Damper LR Circuit Failure
C2738 Locomobile 90 Timing Reference High Resolution Signal A Too Few Pulses
C2738 Isuzu Vx
C2738 Pininfarina Eta Engine Temperature Light Monitor Failure
C2738 Mercedes Cls 63 ABS Outlet Valve Coil RR Circuit Short To Battery