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.
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HOMESERVICE MANUALSSAAB1993900 S, 2D HATCHBACK, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODESFAULT CODES (WITHOUT USING ISAT SCAN TESTER)ERROR CODE 12251 (LH 2.4.2 ONLY)
1993 Saab 900 S, 2D Hatchback, Standard
Error Code 12251 (LH 2.4.2 Only)
1993 Saab 900 S, 2D Hatchback, StandardSECTION Error Code 12251 (LH 2.4.2 Only)
- The check engine light is off. The signal from the throttle potentiometer is incorrect or missing.
- With harness disconnected at potentiometer check throttle potentiometer function.
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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.