C3776 Diagnostic Trouble Code

C3776 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 C3776 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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
Dirty air cleaner element Damaged DPF

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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. 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.

Process Tips

Diagnostic trouble code C3776 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 C3776.

Fortunately, C3776 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3776 Trouble Code For Specific Cars

C3776 Austin A40 Autolamp Delay Increase Circuit Open
C3776 Ac Aceca ABS Acceleration Switch Circuit Failure
C3776 Honda Integra PSPS Out Of Self Test Range
C3776 Mg Pb Air Suspension Warning Lamp Circuit Short To Ground
C3776 Turner 1100 Pedal Position Rearward Switch Circuit Short to Battery
C3776 Abc Sports A/C Refrigerant Pressure Sensor Circuit Low Input
C3776 Aero Type 30 ABS Outlet Valve Coil LR Circuit Failure