What is the P0739 fault number? What is the TCM Engine Speed Output Circuit high error code description? How can you fix P0739 fault codes? What are the causes and symptoms of the P0739 error code?
What is the P0739 fault code? What does it signify?
If the voltage signal received from the circuit or engine speed output sensor is greater than setpoints, a code P0739 will trigger.
To control, regulate and calculate the transmission’s shifting strategies, the PCM/TCM employs a variety sensors and switches. It uses an engine speed sensor (ESS), to determine the shift points. This sensor’s task is, as its name implies, to calculate the engine’s rotational speed (RPM). It is sometimes referred to as either the crankshaft position sensor, (CKP), and transmission output shaft speeds sensor (OSS). If it senses a voltage signal from this sensor, the PCM/TCM will set trouble code (P0739) and activate the check engines light to notify drivers.
The P0739 fault code can affect vehicles of all makes and models, including but not limited to Dodge, Mercedes Benz Land Rover, Jeeps, Dodge, Mercedes Benz Land Rover, Jeeps, Chevrolet, GMC Duramax Ford, Mini Honda Acura, Acura, Jaguar, and Mercedes Benz.
What causes the P0739 Fault code?
These are the most common reasons that P0739 codes are triggered:
- – Defective gearbox output shaft speed sensor
- – Defective transmission input shaft speed sensor
- – Defective crankshaft position sensor
- – Defective output shaft position sensor / crankshaft speed sensor reluctor wheel
- – Broken, melted, corroded, or damaged wires to sensors that cause an open or brief circuit
- – Remove loose or rusty sockets/connectors
- – Defective shift solenoid(s)
- – Missing or dirty transmission fluid
- – Obstructions to transmission fluid lines
- – Engine temperature sensor (or other defective sensors)
- – A PCM/TCM is defective or must be reprogrammed
What are the symptoms of P0739 Malfunction Code?
You may experience the following symptoms if your vehicle has the code P0739:
- – Illumination at the check engine lights
- – Requires hard, delayed, and unpredictable shifting
- Transmission cannot change gears
- Gearbox slip / slip
- – Increased fuel use
- Faulty speedometer or non-working speedometer
- Engine misfires
- – Engine hesitation during acceleration
- – Engine stalling during idling, or when it stops
- – PCM may enter failsafe mode (limp Mode) to limit engine power
How do I fix the P0739 fault code?
The following repairs may be able to resolve the P0739 fault code:
- – Replacing the defective transmission output shaft speed sensor
- – Replacing the defective input shaft speed sensor of a transmission
- – Replace the crankshaft position sensor
- Repair damaged wires, connectors and open or short circuits to sensors
- – Inspect the sensor reluctor wheels and replace them if necessary
- – Replacing faulty solenoid(s).
- – Filling in the gaps with transmission fluid
- – Replacing dirty or contaminated transmission oil
- – Clean lines that prevent fluid flow
- – Replacement of or reprogramming the PCM/TCM
How Serious Is the P0739 Fault Coding?
If your vehicle displays a set fault code of P0739, it means your vehicle has an important fault that requires your attention. This code can cause engine performance and driveability problems. You might experience problems such as engine power loss, incorrect gear changes and misfire. Continued use of the vehicle in this manner can increase the severity of the problem and increase costs. The problem must be fixed quickly.
