P1637 OBD Trouble Code

1 result found

P1637 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

Generator 'L' Terminal Circuit Conditions

Cause

Engine running, then the PCM detected the state of 'L' terminal feedback indicated low Generator system voltage for 15 seconds

Try also: http://www.obd-codes.com/p1637