P112E Diagnostic Trouble Code

P112E 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 P112E 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
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
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 :

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

Process Tips

Diagnostic trouble code P112E 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 P112E.

Fortunately, P112E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P112E Trouble Code For Specific Cars

P112E Cadillac Sts Dimmer switch Circuit Short to Gnd
P112E Ford Mondeo Mirror Driver Vertical Switch Circuit Short To Battery
P112E Invicta 3-litre SCP (J1850) Invalid or Missing Data for Mirrors
P112E Smart Fortwo Ii Lamp Anti-Theft Indicator Circuit Failure
P112E Fiat 508 Lamp Backup Switch Input Circuit Short To Battery
P112E Fiat 8v LAMP DOME OUTPUT Circuit Failure
P112E Toyota Avallon NVM RF HR Failure