C2601 Diagnostic Trouble Code

C2601 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 C2601 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
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.
Faulty IMRC actuator relay (if equipped)

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. 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 C2601 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 C2601.

Fortunately, C2601 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2601 Trouble Code For Specific Cars

C2601 Cadillac Bls Data Mismatch #2 (receive data does not match what was expected)
C2601 Opel Kadett Dimmer switch Circuit Short to Gnd
C2601 Alfa Romeo Stelvio Air Bag Crash Sensor #2 Ground Circuit Failure
C2601 Audi 90 Ambient Air Temperature Sensor Circuit
C2601 Mercedes-benz 150 Air Bag Driver/Passenger Circuit Short To Ground
C2601 Toyota Aristo NVM Alarm Data Failure
C2601 Toyopet Crown Motor Temperature Out of Range