C2747 Diagnostic Trouble Code

C2747 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 C2747 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Reduction in engine performance, especially at low RPM levels

Possible Causes :

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.
Some aftermarket accessories and performance modifications
An air leak forward of the DPF will change the sensor readings resulting in the code

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. 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 C2747 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 C2747.

Fortunately, C2747 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2747 Trouble Code For Specific Cars

C2747 Abarth 1600
C2747 Vauxhall Firenza Pressure Control Solenoid A Control Circuit / Open
C2747 Caterham 120 Superlight Door Ajar Lamp Circuit Short To Ground
C2747 Hudson Wasp Right Front Vertical Accelerometer Circuit Failure
C2747 Lanchester 18 Speed Control Command Switch Out of Range Low
C2747 Lamborghini Jarama Signal Link Short to Ground (Non SCP) / From NGV Module
C2747 Lancia Musa SSA Inductive Signature Malfunction