C2403 Diagnostic Trouble Code

C2403 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 C2403 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
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 :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2403 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 C2403.

Fortunately, C2403 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2403 Trouble Code For Specific Cars

C2403 Sunbeam-talbot Mk Iii Master Cylinder Pressure Sensor Circuit Failure
C2403 Vauxhall Wyvern Pressure Transducer Main / Primary signal Faulted
C2403 Bugatti Eb118 Cylinder #5 High To Low Side Open
C2403 Ford E-250 Manifold Absolute Temperature Circuit High Input
C2403 Plymouth Acclaim Evaporative Emission Control System Incorrect Purge flow
C2403 Maserati 124 Transmission 4-Wheel Drive Mode Select Short Circuit To Ground
C2403 Mercedes C 32 ABS Inlet Valve Coil LR Circuit Short To Battery