P0928 Diagnostic Trouble Code

P0928 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 P0928 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Some aftermarket accessories and performance modifications

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. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code P0928 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 P0928.

Fortunately, P0928 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0928 Trouble Code For Specific Cars

P0928 Packard De Driver Door Ajar Circuit Failure
P0928 Sunbeam 14 Main Blower Motor Relay Circuit Short to Battery
P0928 Heuliez Pregunta Passenger's Seat Occupied Switch Circuit Short to Ground
P0928 Gmc Acadia Park / Neutral Switch Input Circuit Low
P0928 Jensen Sp Seat Driver Recline Rearward Switch Circuit Short To Battery
P0928 Isdera Commendatore SCP (J1850) Invalid or Missing Data for Personalization (Memory) Features
P0928 Perodua Kelisa Driver's Seatbelt Tension Reducer Circuit Short to Ground