P0739
TCM Engine Speed Output Circuit High
P0739 is an OBD-II diagnostic trouble code meaning: TCM Engine Speed Output Circuit High. Common causes: open or short circuit in engine output speed circuit, engine speed sensor malfunction. Estimated repair cost: $6–56.
Symptoms
- Incorrect gear shifting
- Enabling transmission emergency mode
- Check Engine Light Illuminates
- Reduced vehicle dynamics
- Floating engine speed
Causes
- Open or short circuit in engine output speed circuit
- Engine speed sensor malfunction
- Connector problems or contact corrosion
- Transmission control module (TCM) internal malfunction
- Wiring Harness Problems
How to Fix
- Check the continuity of the motor output speed circuit
- Inspect and clean connector contacts
- Check the functionality of the engine speed sensor
- Scan the transmission control unit for errors
- Replace damaged components if necessary
Related codes
Error P0739 by Vehicle Brand
FAQ
What does the P0739 code mean?
P0739 is an OBD-II diagnostic trouble code that indicates: TCM Engine Speed Output Circuit High
What causes a P0739 error code?
The most common causes of P0739 include: Open or short circuit in engine output speed circuit; Engine speed sensor malfunction; Connector problems or contact corrosion; Transmission control module (TCM) internal malfunction.
How do I fix a P0739 diagnostic trouble code?
To fix P0739: Check the continuity of the motor output speed circuit. Inspect and clean connector contacts. Check the functionality of the engine speed sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0739?
Limited driving only, diagnose soon
How much does it cost to fix P0739?
The estimated repair cost for P0739 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat