OBD-II Generic Error Code P0780: How to Fix Shift Malfunction

Q: Can I drive with error code P0780?

It is not recommended to drive with a P0780 code as it can cause further transmission damage and unsafe driving conditions. Have the issue diagnosed and repaired as soon as possible.

Q: What causes error code P0780?

Common causes include low or dirty transmission fluid, faulty shift solenoids, wiring issues, a stuck valve in the valve body, or internal transmission failure.

Q: How much does it cost to fix P0780?

Costs vary widely depending on the cause. A simple fluid change or solenoid replacement might cost $150-$400, while a valve body or transmission rebuild can exceed $2,000.

Q: Can a bad TCM cause P0780?

Yes, a faulty transmission control module (TCM) can cause shift malfunctions and trigger P0780. However, TCM failure is less common than solenoid or fluid issues.

Q: Will clearing the code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue will remain. The code will return unless the root cause is addressed.

Abstract

Error code P0780 indicates a shift malfunction in your vehicle's automatic transmission. This code is triggered when the powertrain control module (PCM) detects a problem with the shift control system, such as incorrect gear ratios, stuck shift solenoids, or transmission mechanical issues. Ignoring this code can lead to further transmission damage, so prompt diagnosis is recommended.