P2781

Downshift Switch Circuit High

DTC P2781, sometimes indicated as P278100 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 downshift switch circuit high.

  • P2781: Downshift Switch Circuit High
  • P2781: Transmission gear selection switch, downshift – circuit high
  • P2781 00: Transmission gear selection switch, downshift - circuit high

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.

  • N212350930 - FUEL SYSTEM, GASOLINE
    CHEVROLET: Service update. Certain vehicles may incorrectly report to test tools an active permanent status of transmission control module (tcm) diagnostic trouble code (dtc) P2781 (downshift switch circuit high). This could cause the vehicle to not
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