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, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESFAULT CODES (WITHOUT USING ISAT SCAN TESTER)ERROR CODE 12225
1990 Saab 900 Base, 4D Sedan, 2.0 D, Standard
Error Code 12225
1990 Saab 900 Base, 4D Sedan, 2.0 D, StandardSECTION Error Code 12225
- The check engine light is on. Oxygen sensor output is incorrect. Sensor pre-heater circuit may be open. Engine temperature must be above 158°F.
- Check oxygen sensor output voltage (voltage fluctuating between 0 and 1.0 volt). Check oxygen sensor pre-heater circuit and fuse.
RENDER: 1.0x
NO RELATED
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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.