P3939 Trouble Code

View P3939 obd/2 error code description and symptoms. P3939 engine photo

The Camshaft Position sensor will signal the Engine Control Module when the #1 cylinder is ready for the spark plug to fire (top-dead-center on compression stroke). The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

On some transmissions, such as automated manual transmissions or automatic transmissions with manual mode, the GSP switch lets the TCM know whether or not the driver has selected automatic or manual function. On manual transmissions, the GSP switch informs the TCM which gear the driver is selecting, and may function as a neutral safety switch, depending on system design. The TCM also uses the gate select position switch to monitor transmission operation. For example, if the driver selects manual mode and selects 3rd gear on an automatic transmission, the TCM may monitor speed sensors to detect clutch and brake slippage.

P3939 Error Code Repair Process :

If your stability control inhibit warning check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P3939 and engine control unit are in charge of monitoring a bunch of different stability control inhibit warning, and if they get a reading that's a little out of whack, up pops the check engine light.

P3939 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P3939

A common cause of code P3939 is the failure of Stability Control Inhibit Warning, but there are several other possible causes as well, such as ;

Clogged or faulty fuel injector (s)
Faulty Camshaft Position Sensor
Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
Variable Camshaft Timing (VCT) position circuit poor electrical connection

P3939 code for all cars

You can view according P3939 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P3939 Ferrari 206

+P3939 Chrysler Chronos

+P3939 Alfa Romeo 6c

+P3939 Rolls-royce Park Ward

+P3939 Lamborghini Islero

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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