C2649 Diagnostic Trouble Code

C2649 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 C2649 diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. 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 C2649 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 C2649.

Fortunately, C2649 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2649 Trouble Code For Specific Cars

C2649 Mitsubishi Jeep Autolamp Sensor Input Circuit Failure
C2649 Mercedes C 32 ABS Inlet Valve Coil LR Circuit Short To Battery
C2649 Chevrolet Aveo Driver Door Handle Circuit Short To Ground
C2649 Tvr 1600 Phone Handset Circuit Failure
C2649 Pininfarina Spider Evaporative Check Solenoid Circuit Malfunction
C2649 Citroen C1 Ii Front Sounder Circuit Short to Vbatt
C2649 Nissan Violet Cylinder #6 High To Low Side Open