P1A8C Diagnostic Trouble Code

P1A8C 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 P1A8C diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
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.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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 P1A8C 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 P1A8C.

Fortunately, P1A8C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1A8C Trouble Code For Specific Cars

P1A8C Buick Park Avenue Cylinder 9 Injector Circuit Low
P1A8C Lagonda Special Six Shift Solenoid E Electrical
P1A8C Nissan Juke Coast Clutch Solenoid Inductive Signature Malfunction
P1A8C Bianchi S Brake Pedal Input Circuit Ground Short
P1A8C Suzuki X90 Mirror Driver Vertical Feedback Potentiometer Circuit Short to Ground
P1A8C Mitsubishi L300 Autolamp Sensor Input Circuit Short To Battery
P1A8C Seat Leon 3 Injector High Side Open - Bank 1