P0102 Diagnostic Trouble Code

P0102 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 P0102 diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

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. 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. 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 P0102 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 P0102.

Fortunately, P0102 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0102 Trouble Code For Specific Cars

P0102 Isuzu Irmscher SCP (J1850) Invalid or Missing Data for Traction Motor
P0102 Mercedes R 500 Accessory Delay Relay Coil Circuit Short To Battery
P0102 Porsche 911 Front Wiper Select Switch "W" Short to Ground
P0102 Morris Cowley Brake Pedal Input Circuit Ground Short
P0102 Tmc Costin Motor # 1 Input Circuit Failure
P0102 Moretti Coupe Blower (Fan) Circuit Failure
P0102 Citroen Pluriel Fuel Pump Secondary Circuit High