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C1939 Engine Code Repair

Meaning of C1939 engine trouble code is a kind of chassis trouble code and theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $240-$400 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

C1939 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 C1939 code is occuring now you should check C1939 repair processes.
Now don't ask yourself; What should you do with C1939 code ?
The solution is here :

C1939 Possible Solution:

C1939 Engine

Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.

C1939 Code Meaning :

C
OBD-II Diagnostic Chassis (C) Trouble Code For Engine

1
Fuel And Air Metering

9
Engine Oil Temperature Sensor Malfunction

3
Turbocharger Boost Sensor A Circuit Low

9
Clutch Position Sensor Circuit Malfunction

Regarding the C1939 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

C1939 OBD-II Diagnostic Chassis (C) Trouble Code Description

C1939 engine trouble code is about Clutch Position Sensor Circuit Malfunction.

Main reason For C1939 Code

The reason of C1939 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

C1939 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.