Error code

OBD2 P0780

OBD2P0780
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Shift Error.

Severity

highDrive cautiously with reduced speed and avoid heavy loads. Seek repair immediately.

Summary

P0780 indicates a shift error in the transmission's gear selection mechanism, typically caused by mechanical issues rather than electrical faults.

Symptoms

  • Check Engine light is on
  • Harsh or failed shifts
  • Transmission overheating and slippage
  • Decreased fuel efficiency

Common Causes

  • Low transmission fluid
  • Dirty or contaminated transmission fluid
  • Hydraulic blockages inside the transmission
  • Defective shift solenoid
  • Poor electrical connection to shifting solenoid valve
  • Mechanical internal transmission failures
  • Faulty PCM or TCM

Diagnosis

  1. Check fluid levels and condition
  2. Inspect for blockages in hydraulic passages
  3. Test shift solenoids and electrical connections
  4. Scan for related codes (P0742, P0894, P0973, P0974, P0976, P0977)
  5. Consider chassis/body system codes as they may affect transmission sensors

Fixes

  • Replace faulty shift solenoid
  • Repair or replace internal transmission components

FAQ

What should I do if my Check Engine light comes on with P0780?

Check your transmission fluid levels and condition, inspect for blockages, test shift solenoids, and scan for related codes. If issues persist, seek professional help.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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