Charging System DTCS

2000 Saturn LS1 AutomaticSECTION Charging System DTCS
CHARGING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description
2.2L Engine
P0621 Generator "L" Terminal Circuit Lower Or High Voltage
P0622 Generator "F" Terminal Circuit Incorrect Duty Cycle
3.0L Engine
P0621 Generator "L" Terminal Circuit Open
P1637 Generator "L" Terminal Circuit Low Voltage
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.