P03A8 Diagnostic Trouble Code

P03A8 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 P03A8 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
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.
Faulty IMRC actuator/sensor

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.

Process Tips

Diagnostic trouble code P03A8 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 P03A8.

Fortunately, P03A8 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P03A8 Trouble Code For Specific Cars

P03A8 Case Jic Door Ajar Lamp Circuit Failure
P03A8 Mercedes E 400 Acceleration Position Sensor Conflict
P03A8 Austin 2200 Audio Tape Deck Unit is Not Responding
P03A8 Adler 14 ABS Inlet Valve Coil RR Circuit Failure
P03A8 Nissan M 45 Column Tilt Feedback Potentiometer Circuit Short to Ground
P03A8 Chevrolet Astrovette Driver Door Handle Circuit Failure
P03A8 Delahaye Break Hydraulic Pressure Sensor Circuit Intermittent