P029C Diagnostic Trouble Code

P029C 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 P029C diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Faulty IMRC actuator/sensor

Repair Processes :

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. 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 P029C 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 P029C.

Fortunately, P029C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P029C Trouble Code For Specific Cars

P029C Siata 1250 Intake Air Temperature Circuit Malfunction
P029C Moretti 1100 Battery Saver Relay Coil Circuit Open
P029C Mercedes-benz A Class Air Bypass Valve Circuit Malfunction
P029C Audi A8 ANTI THEFT HORN OUTPUT CIRCUIT Short to Gnd
P029C Subaru Alfa Led #1 Circuit Failure
P029C Volkswagen 1600 Rear Doppler Sensor Circuit Failure
P029C Mercedes E 280 ABS Power Relay Output Short Circuit To Battery