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.
1998 Saturn SW1 AutomaticFACTORY OEM SERVICE PROCEDURE
Instrument Panel DTCS
INSTRUMENT PANEL DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | DEFINITION |
|---|---|
| DTC P0462 | Fuel Gauge Circuit Voltage Low |
| DTC P0463 | Fuel Gauge Circuit Voltage High |
| DTC P0656 | Fuel Gauge Circuit Fault |
| DTC P1640 or P1641 | Quad Driver A Output Fault |
| DTC P1650 or P1651 | Quad Driver B Output Fault |
| DTC P1691 | Coolant Gauge Circuit Fault |
| DTC P1693 | Tachometer Circuit Fault |
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.
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