P1789

Transmission Mechanical Failure - First And Reverse

DTC P1789, sometimes indicated as P178900 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the transmission (gearbox) causing transmission mechanical failure - first and reverse.

  • P1789: Transmission Mechanical Failure - First And Reverse

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • PIP5818A - EQUIPMENT:ELECTRICAL
    CHEVROLET: This preliminary information communicates additional diagnostics for P1789.
  • PIP5818A - EQUIPMENT
    CHEVROLET: This preliminary information communicates additional diagnostics for P1789.
  • PIP5818 - ELECTRICAL SYSTEM
    CHEVROLET: This preliminary information communicates additional diagnostics for P1789.
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