P0739Ram 2500Years: 1996 - 2026
TCM Engine Speed Output Circuit (P0739)
Reviewed by ASE Certified Technician
What does this mean?
Code P0739 indicates a problem with the TCM engine speed output circuit.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Ram 2500 models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Internal PCM/ECM failure
Damaged, chafed, or broken wiring harness
Corroded or loose electrical connector
Symptoms to Watch For
- Check Engine Light is illuminated
- Hard or harsh gear shifting
- Transmission slipping between gears