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 MANUALSSAAB1990900 BASE, 4D SEDAN, 2.0 D, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESFAULT CODES (WITHOUT USING ISAT SCAN TESTER)ERROR CODE 12113
1990 Saab 900 Base, 4D Sedan, 2.0 D, Automatic
Error Code 12113
1990 Saab 900 Base, 4D Sedan, 2.0 D, AutomaticSECTION Error Code 12113
- The check engine light is off. There is a problem with AIC self-compensating circuit (system unable to reduce idle speed to correct level).
- Check throttle stop screw setting. Check throttle plate for an over-center condition. Check for vacuum leaks.
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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.