C3371 Diagnostic Trouble Code

C3371 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 C3371 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code C3371 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 C3371.

Fortunately, C3371 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3371 Trouble Code For Specific Cars

C3371 Audi C Anti Theft Input Signal Circuit Short To Battery
C3371 Ford Country Main Catalyst Efficiency Below Threshold (Bank 2)
C3371 Cottin-desgouttes 12 Fuel Shut Off Solenoid Malfunction
C3371 Railton 20 Fuel Temperature Sensor A Circuit Intermittent
C3371 Invicta S1
C3371 Opel Tigra A Door Handle Right Front Short To Battery
C3371 Fiat Vivace Left Power Sliding Door Open/Close Output Circuit Short to Battery