P0780 OBD II Trouble Code Shift Malfunction
Symptoms of P0780 OBD II Trouble Code
- Erratic transmission shift patterns
- Delayed transmission engagement
- Harsh transmission shifts (especially if the controller has been placed in limp-in mode)
- Transmission slippage
- Whining noise from the transmission pump
Common Causes of P0780 OBD II Trouble Code
- Shorted or open circuits in the transmission control harness
- Low transmission fluid
- Outdated or burnt transmission fluid
- Defective shift solenoid/s
- Faulty input or output sped sensors
- Bad electronic pressure regulator
- Failed transmission pump
- Mechanical failure; including torque converter failure, clutch failure, or internal component wear/breakage
- A defective PCM or a PCM programming error
Severity of P0780 OBD II Trouble Code
A P0780 transmission shift malfunction code should be addressed as urgent. A minor condition could morph into a catastrophic one if left unattended for an extended period of time.