P2311 Diagnostic Trouble Code

P2311 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 P2311 diagnostic trouble code may include:

Faulty or damaged wiring
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
Poor fuel economy
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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.

Process Tips

Diagnostic trouble code P2311 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 P2311.

Fortunately, P2311 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2311 Trouble Code For Specific Cars

P2311 Mitsubishi Magna Aux A/C Blower Speed 2 Circuit Failure
P2311 Trabant 1.1 Passenger Sid, Side mount Airbag Circuit Open
P2311 Dodge Kahuna Ignition Cylinder Sensor Ground Short
P2311 Audi Tt Audio Navigation Unit is Not Responding
P2311 Ferrari P4/5 Keep Alive Memory Test Failure
P2311 Peugeot 508 Ii ELC System 2 Fault
P2311 Ford Zephyr Motor Relay # 1 Circuit Failure