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C3942 Engine Trouble Code

Meaning of C3942 engine trouble code is a kind of chassis trouble code and when your car's 'C3942 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

C3942 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for C3942 code is occuring now you should check C3942 repair processes.
Now don't ask yourself; What should you do with C3942 code ?
The solution is here :

C3942 Possible Solution:

C3942 Engine

The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver.

C3942 Code Meaning :

C 3 9 4 2
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Ignition System Or Misfire Injector Circuit Malfunction - Cylinders Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector) Glow Plug/Heater Circuit 'A' Malfunction

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

C3942 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3942 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Main reason For C3942 Code

The reason of C3942 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

Parts or components should not be replaced with reference to only a C3942 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.