P2739 Code:

OBD-II Diagnostic Powertrain (P) Trouble Code

Possible Cause

P2739 code applies to vehicles equipped with dual clutch adaptive transmissions, automated manual transmissions, manual transmissions and automatic transmissions. Technicians also report the presence of excessive corrosion in the sensor connector as the cause of this code being stored.

Common Symptoms

  1. Normally, if there is less than 50 ohms of resistance, then you would replace the sensor
  2. Look for shorted or burned wiring and replace circuitry and connectors as required
  3. Many scanners will permit the technician to retrieve these alpha numeric numbers (or codes) prior to controller replacement
  4. To perform a thorough diagnosis, any transmission leaks should be repaired and the transmission should be filled with the proper amount and type of fluid (if the fluid smells really "burnt" and you are experienced enough to detect it, you may go ahead and condemn the transmission)

Similar Problems

Vehicle Speed Control And Idle Control System
Crankshaft Position Sensor Circuit Performance
TFP Valve Position Switch-Drive Without Drive Ratio

P2739 Troubleshooting

Having one of the signs of a bad gasket is usually not enough to prove a failure of a gasket, but multiple symptoms are most likely the result of gasket failure. It is advisable to have the vehicle driven as little as possible whenever the symptoms occur. Depending on the symptoms, either have the gasket replaced or repaired.
The cost of replacing a gasket usually varies from one mechanic to the other. Replacing a gasket is quite expensive in modern engines due to their location and the amount of labor that is required to replace them. P2739 OBD2 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.

How to turn off P2739 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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