C126D Diagnostic Trouble Code

C126D 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 C126D diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

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. 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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code C126D 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 C126D.

Fortunately, C126D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C126D Trouble Code For Specific Cars

C126D Autovia V8 Aux Heater Glow Plug Circuit Open
C126D Dodge R-ft Ignition Run/Start Circuit Short To Battery
C126D Frazer Nash Sebring NVM Alarm Data Failure
C126D Hurtu Type X Rotor Sensor Fault
C126D Triumph Vitesse Pedal Demand Sensor B Circuit High Input
C126D Bmw B10 Climate Control Air Temperature Internal Sensor Motor Circuit Failure
C126D Skoda 450 Keyless Entry Circuit Short To Ground