P1843 OBD Trouble Code

1 result found

P1843 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

1-2 Shift Solenoid Circuit High Input (4T80-E Transmission)

Cause

Engine runtime over 5 seconds, system voltage from 8-18v, Fuel Cutoff inactive, 1-2 Shift Solenoid commanded on by the PCM, then the PCM detected a continuous short to power on the 1-2 Shift Solenoid feedback circuit for 4.3 seconds.

Try also: https://www.obd-codes.com/p1843