C3676 Diagnostic Trouble Code

C3676 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 C3676 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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.

Process Tips

Diagnostic trouble code C3676 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 C3676.

Fortunately, C3676 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3676 Trouble Code For Specific Cars

C3676 Facel Vega Excellence Injection Timing Control Circuit Malfunction
C3676 Daf 600 Gear Lever Y Position Circuit
C3676 Honda Insight PSP Switch Input Malfunction
C3676 Mitsubishi Cz Audio Steering Wheel Control Unit is Not Responding
C3676 Zastava Yugo
C3676 Mercedes C 200 ABS Hydraulic Pump Motor Circuit Short To Ground
C3676 Maserati Spider Transmission Mechanical 4-Wheel Drive Axle Lock Lamp Circuit Short To Battery