P1661 OBD Trouble Code

1 result found

P1661 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

MIL Control Circuit Conditions

Cause

Engine speed over 600 rpm, then the PCM detected that the Actual and Commanded state of the MIL Control circuit did not match, condition met for over 5 seconds.

Try also: https://www.obd-codes.com/p1661