Honda Error Code P1739: How to Fix It

Q: What causes Honda P1739 error code?

P1739 is typically caused by damaged wiring between the TCM and other modules, poor ground connections, low battery voltage, or a failing TCM. Water damage, rodent damage to wiring, or connector corrosion are common culprits.

Q: Can I drive with Honda P1739 code?

It's not recommended to drive with P1739 as it indicates serious transmission communication issues. You may experience erratic shifting, stuck in one gear, or complete transmission failure. Get it diagnosed immediately.

Q: How much does it cost to fix Honda P1739?

Repair costs vary widely depending on the cause. Simple wiring repairs may cost $200-500, while TCM replacement can cost $1,500-3,000 including programming. Diagnostic fees typically range from $100-150.

Q: Will P1739 cause transmission damage?

Yes, continued driving with P1739 can cause transmission damage due to improper shift timing and pressure control. The TCM cannot properly manage transmission functions without proper communication.

Q: Do I need Honda dealer to fix P1739?

While not always required, Honda dealers have specialized diagnostic equipment and access to TCM programming. Independent shops with proper Honda diagnostic tools can often handle repairs, but TCM replacement typically requires dealer programming.

Abstract

Honda error code P1739 indicates a communication problem between the Transmission Control Module (TCM) and other vehicle systems. This serious issue can cause transmission performance problems, shifting delays, or complete transmission failure if not addressed promptly.