P2009 Diagnostic Trouble Code

P2009 is a kind of OBD-II Diagnostic P-Powertrain 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 P2009 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
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Fuel with a large percentage of sulfur will clog the DPF quickly

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. 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.

Process Tips

Diagnostic trouble code P2009 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 P2009.

Fortunately, P2009 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2009 Trouble Code For Specific Cars

P2009 Sunbeam-talbot Rapier Master Cylinder Pressure Sensor Circuit Open
P2009 Austin A35 Autolamp Delay Increase Circuit Failure
P2009 Chevrolet Citation Driver Rear Door Ajar Circuit Open
P2009 Borgward 1800 Control Module Programming Error
P2009 Chrysler Phaeton Evaporative Vac Solenoid Circuit Malfunction
P2009 Renault 21
P2009 Nissan Sedan Cruise Control Coast Signal Malfunction