C3306 Diagnostic Trouble Code

C3306 is a kind of OBD-II Diagnostic C-Chassis 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 C3306 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 :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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 at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C3306 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 C3306.

Fortunately, C3306 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3306 Trouble Code For Specific Cars

C3306 Porsche Coupe Fuel Pump Monitor Circuit Low Input
C3306 Oldsmobile Ninety-eight Cylinder Head Temp Sensor Out Of Self Test Range
C3306 Alfa Romeo Long Air Bag Crash Sensor #1 Feed/Return Circuit Short To Ground
C3306 Toyota Raum Park Brake Switch # 2 Released Circuit Failure
C3306 Frazer Nash Sebring NVM Alarm Data Failure
C3306 Maserati Boomerang Transmission Fluid Pressure Sensor/Switch C Circuit Intermittent
C3306 Mercedes-benz 450 Air Bag Safing Sensor Output Circuit Open