P1116 Diagnostic Trouble Code

P1116 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 P1116 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
Reduction in engine performance, especially at low RPM levels

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 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. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code P1116 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 P1116.

Fortunately, P1116 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1116 Trouble Code For Specific Cars

P1116 Proton Inspira Fuel Shut Off Solenoid Malfunction
P1116 Citroen Evasion Fuel level Sensor Circuit Low Input
P1116 Ford 49 LF LAMP HIGH BEAM CIRCUIT Failure
P1116 Alfa Romeo Junior Air Bag Crash Sensor #1 Feed/Return Circuit Open
P1116 Invicta 12
P1116 Saturn Ls Immobilizer ID Does Not Match
P1116 Mazda Verisa A/C Evaporator Air Temperature Circuit Range/Performance