C3655 Diagnostic Trouble Code

C3655 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 C3655 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 :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. 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.

Process Tips

Diagnostic trouble code C3655 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 C3655.

Fortunately, C3655 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3655 Trouble Code For Specific Cars

C3655 Plymouth Savoy Excessive Clutch Slippage
C3655 Nissan C 52 Climate Control Temperature Differential Circuit Open
C3655 Alfa Romeo 145 ABS Outlet Valve Coil RF Circuit Open
C3655 Fiat 12 Hp Kickdown Relay Hold Circuit Fault
C3655 Mazda Rustler 4X4 Switch Out of Self Test Range
C3655 Berkeley Qb Brake Fluid Level Sensor Input Circuit Failure
C3655 Talbot Minx Mirror Passenger Horizontal Switch Circuit Short To Ground