P0954 Diagnostic Trouble Code

P0954 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 P0954 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P0954 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 P0954.

Fortunately, P0954 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0954 Trouble Code For Specific Cars

P0954 Izh Oda Seat Direction Switch Assembly Circuit Short To Ground
P0954 Toyota Mark X Oil Temperature Sensor Circuit Short To Ground
P0954 Proton Savvy Fuel Tank Pressure Sensor Circuit Open
P0954 Isuzu I-350
P0954 Mercedes Cls 300 ABS Outlet Valve Coil RF Circuit Failure
P0954 Volkswagen Saveiro SAI System Incorrect Downstream Flow Detected
P0954 Skoda Fabia Kickdown Hold Relay Open or Short Circuit to Ground