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C3975 Engine Trouble Code

Meaning of C3975 engine trouble code is a kind of chassis trouble code and C3975 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.

C3975 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 C3975 code is occuring now you should check C3975 repair processes.
Now don't ask yourself; What should you do with C3975 code ?
The solution is here :

C3975 Possible Solution:

C3975 Engine

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

C3975 Code Meaning :

C 3 9 7 5
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Ignition System Or Misfire Injector Circuit Malfunction - Cylinders Cylinder 10 Contribution/balance Fault Crankshaft Position Sensor B Circuit Malfunction

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

C3975 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3975 engine trouble code is about Crankshaft Position Sensor B Circuit Malfunction.

Main reason For C3975 Code

The reason of C3975 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

C3975 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.