C2907 Diagnostic Trouble Code

C2907 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 C2907 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

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. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C2907 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 C2907.

Fortunately, C2907 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2907 Trouble Code For Specific Cars

C2907 Toyota 1600 Needle Lift Sensor Malfunction
C2907 Daf 33 Gear Lever Push - Pull Switch (Shift Anticipate)
C2907 Audi Rs4 ASM Mode Circuit High
C2907 Nardi Blue Catalyst Damage
C2907 Lancia Stratos Stability Control Inhibit Warning
C2907 Alfa Romeo Long Air Bag Crash Sensor #1 Feed/Return Circuit Short To Ground
C2907 Renault Scenic 4 High Mount Stop Lamp Circuit Failure