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.
2000 Saturn LS AutomaticFACTORY OEM SERVICE PROCEDURE
Cruise Control (3.0L) DTCS
CRUISE CONTROL (3.0L) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Definition |
|---|---|
| P0121 | Throttle Position Sensor No. 1 Performance |
| P0122 | Throttle Position Sensor No. 1 Low Voltage |
| P0123 | Throttle Position Sensor No. 1 High Voltage |
| P0221 | Throttle Position Sensor No. 2 Performance |
| P0222 | Throttle Position Sensor No. 2 Low Voltage |
| P0223 | Throttle Position Sensor No. 2 High Voltage |
| P0500 | Vehicle Speed Sensor Circuit |
| P0571 | Cruise Control Brake Switch Circuit |
| P0705 | Transaxle Range Switch Circuit |
| P1271 | APP Sensor No. 1-2 Correlation |
| P1277 | APP Sensor No. 1 Circuit - Low Voltage |
| P1278 | APP Sensor No. 1 Circuit - High Voltage |
| P1282 | APP Sensor No. 2 Circuit - Low Voltage |
| P1283 | APP Sensor No. 2 Circuit - High Voltage |
Factory Service Tools
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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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