C127A Diagnostic Trouble Code

C127A 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 C127A 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 :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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 C127A 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 C127A.

Fortunately, C127A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C127A Trouble Code For Specific Cars

C127A Zender 30-7
C127A Mazda Sport A/C Cycling Period Too Short
C127A Lada 2110 Shift Solenoid A Malfunction
C127A Subaru Svx Longitudinal Acceleration Threshold Exceeded
C127A Lizard Project Throttle/Pedal Position Sensor/Switch C Circuit High Input
C127A Ferrari Modulo IP Power Sliding Door Open/Close switch Ckt Short to Gnd
C127A Holden Hj Power Door Memory Lock Relay Circuit Short To Battery