C2906 Diagnostic Trouble Code

C2906 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 C2906 diagnostic trouble code may include:

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

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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. 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 C2906 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 C2906.

Fortunately, C2906 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2906 Trouble Code For Specific Cars

C2906 Honda Stream Reverse Inhibit Control Circuit Malfunction
C2906 Ac 15 A/C Refrigerant Temperature Circuit Range/Performance
C2906 Kia Picanto Ii Seatbelt Passenger Pretensioner Circuit Resistance Low on Squib
C2906 Railton Ten Fuel Temperature Sensor A Circuit Malfunction
C2906 Lamborghini P Solenoid Current Out Of Range
C2906 Lada Largus Shift Solenoid B Control Circuit Range/Performance
C2906 Cadillac 6.5 Hp Damper RF Circuit Failure