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 Ram 1500 Fuel Temperature Sensor A Circuit Performance
P03A8 Proto Spirra Fuel Restriction Condition
P03A8 Mercedes Sl 60 Air Bag Crash Sensor #2 Ground Circuit Failure
P03A8 Ford Limited Mirror Driver Switch Assembly Circuit Short To Ground
P03A8 Fiat 127 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
P03A8 Kia Stonic Servo Motor Airintake Left Circuit Failure
P03A8 Citroen Gsa Fuel Pressure Regulator 1 Control Circuit