P20F3 Diagnostic Trouble Code

P20F3 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 P20F3 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
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.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code P20F3 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 P20F3.

Fortunately, P20F3 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P20F3 Trouble Code For Specific Cars

P20F3 Land Rover Discovery 2 Steering Column Switch Circuit Short to Battery
P20F3 Oldsmobile 98 Cylinder 5 Misfire Detected
P20F3 Triumph Spitfire PCM Processor Fault
P20F3 Graham Streak Passenger Power Window Motor Circuit Open
P20F3 Honda 145 Pressure Control Solenoid A Control Circuit Low
P20F3 Mitsubishi Hsr-v Autolamp On Circuit Short To Battery
P20F3 Lancia Scorpion SSPOD Open Circuit or Closed Circuit Fault