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Check C1939 Fault Code

When you check engine light came on code C1939 the reason should be . However your vehicle's manufacturer may have a different definition for the C1939 OBD-II Diagnostic Chassis (C) Trouble Code. So you should chech it on our car models.

C1939 Code Reason

C1939 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.

C1939 Possible Fix :

Small but critical, a spark plug makes the car move. Its function is to ignite the compressed fuel in the engine. A worn spark plug will cause a weak spark. It may even prevent ignition entirely, or cause ignition at the wrong time. A misfire will affect engine power and fuel economy and cause massive amounts of potential damage.

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

C1939 Brake Pressure Switch Input Circuit Failure so you have to check ODB-II Fault Code Check list.

Reason For C1939 Code

The reason of C1939 OBD-II Fault Code Check is C1939 Brake Pressure Switch Input Circuit Failure.

C1939 Solution:

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

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