P226C Diagnostic Trouble Code

P226C 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 P226C 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
Diminished fuel efficiency

Possible Causes :

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.
Defective ECU strategies or components will prevent proper regeneration
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 :

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 P226C 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 P226C.

Fortunately, P226C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P226C Trouble Code For Specific Cars

P226C Mercedes Cls 63 ABS Outlet Valve Coil RR Circuit Short To Battery
P226C Cottin-desgouttes 20 Fuel Shutoff Valve Control Circuit Low
P226C Austin Ambassador Autolamp Sensor Input Circuit Open
P226C Costin Amigo Fuel Sender Circuit Short To Ground
P226C Giannini 1000 Oil Change Reset Button Circuit Short To Battery
P226C Berkeley Foursome B-pillar Power Sliding Door Open/Close Switch Input Ckt Short to Gnd
P226C Lloyd Arabella Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance Problem