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.
Diagnostic Procedures
2000 Saturn SC2 Automatic, MP6SECTION Diagnostic Procedures
- Turn ignition on, with engine off. Using scan tool, command EVAP solenoid on and monitor EVAP VENT - HIGH VOLT test. If scan tool indicates TEST FAIL, go to next step. If scan tool does not indicate TEST FAIL, problem is intermittent. See DIAGNOSTIC AIDS .
- Raise vehicle to about chest height. Remove left rear inner fender well. Disconnect EVAP vent solenoid harness connector. Connect a Noid Light (SA9194E) to EVAP vent solenoid harness connector. Using scan tool, command EVAP vent solenoid on and monitor EVAP VENT - HIGH VOLT test. If scan tool does not indicate TEST PASS, go to next step. If scan tool indicates TEST PASS, replace EVAP vent solenoid.
- Check for short to voltage in EVAP vent solenoid circuit (White wire) to PCM. Repair as necessary. If circuit is okay, replace PCM.
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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.