P111A Diagnostic Trouble Code

P111A 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 P111A diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P111A 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 P111A.

Fortunately, P111A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P111A Trouble Code For Specific Cars

P111A Fso Polonez O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
P111A Skoda Felicia Kickdown Relay Hold Circuit Fault
P111A Plymouth Pronto Evaporative Emission Control System Vent Control Circuit Shorted
P111A Bmw X6 Column Reach Feedback Potentiometer Circuit Short to Ground
P111A Tesla S Mismatched PCM and/or ABS-TC Module
P111A Fairthorpe Rockette Injector Circuit Malfunction - Cylinder 6
P111A Mg C-type Air Suspension RR Air Spring/Shock Solenoid Output Circuit Open