P1A68 Diagnostic Trouble Code

P1A68 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 P1A68 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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.

Process Tips

Diagnostic trouble code P1A68 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 P1A68.

Fortunately, P1A68 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1A68 Trouble Code For Specific Cars

P1A68 Chevrolet Comodoro Driver Sid, Side mount Airbag Circuit Short to Ground
P1A68 Porsche 937 Fuel Level Sensor B Circuit High
P1A68 Allard V Air Bag Driver/Passenger Circuit Short To Ground
P1A68 Isuzu Gemini
P1A68 Talbot 1510 Mirror Passenger Drive Circuit Failure
P1A68 Lexus Rx 300 TFT Sensor In Range Failure High
P1A68 Alvis Ta21 Air Pressure Low Circuit Short to Gnd