P1628 OBD Trouble Code

1 result found

P1628 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

PCM Engine Control Temp Pullup Resistor Conditions
Cause

Cold engine startup, then the PCM detected a fault in the PCM pullup resistor used to revise ECT resolution in engine operation.

Try also: https://www.obd-codes.com/p1628