Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Saturn L100FACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE DEFINITIONS
| DTC | Description |
|---|---|
| P0560 | System Voltage |
| P0562 | System Voltage - Low (2.2L) |
| P0562 | System Voltage - Low (3.0L) |
| P0563 | System Voltage - High (2.2L) |
| P0563 | System Voltage - High (3.0L) |
| P0621 | Generator Light L-Terminal Control Circuit (2.2L) |
| P0621 | Generator Light L-Terminal Control Circuit (3.0L) |
| P0622 | Generator F-Terminal Control Circuit |
| P1637 | Generator L-Terminal Control Circuit |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.