C3789 Engine Trouble Code

Meaning of C3789 engine trouble code is a kind of chassis trouble code and when your car's 'C3789 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.

C3789 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 C3789 code is occuring now you should check C3789 repair processes.
Now don't ask yourself; What should you do with C3789 code ?
The solution is here :

C3789 Possible Solution:

C3789 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.

C3789 Code Meaning :

C 3 7 8 9
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Ignition System Or Misfire Fuel Rail Pressure Sensor Circuit Malfunction Ignition/Distributor Engine Speed Input Circuit Malfunction Reverse Input Circuit

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.

C3789 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3789 engine trouble code is about Reverse Input Circuit.

Main reason For C3789 Code

The reason of C3789 OBD-II Engine Trouble Code is Fuel Rail Pressure Sensor Circuit Malfunction.

C3789 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.