P2271 Diagnostic Trouble Code

P2271 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 P2271 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
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
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 P2271 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 P2271.

Fortunately, P2271 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2271 Trouble Code For Specific Cars

P2271 Jaguar Xka Seat Driver Rear Down Circuit Failure
P2271 Le Zebre Type A System Too Rich (Bank 1)
P2271 Renault Espace 5 Gear Shift Reverse Actuator Circuit High
P2271 Toyota Rav4 Park Brake Valve Solenoid #1 Sense Input Circuit Failure
P2271 Ssangyong Rexton Lamp Headlamp High-Beam Circuit Short To Battery
P2271 Ford Laser Mirror Driver Switch Assembly Circuit Open
P2271 Sunbeam-talbot Alpine Master Cylinder Pressure Out of Range