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.
2001 Saab 9-3 Base, 2D Hatchback, AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostics, oxygen sensor 1.: Notes
- If the sensor lead is short circuited to the preheating circuit, diagnostic trouble code P1133 will be generated.
- If the current in the oxygen sensor pre -heating circuit is too low, diagnostic trouble code P1135 will be generated.
- If the current in the oxygen sensor pre -heating circuit is too high, diagnostic trouble code P1136 will be generated.
- If the sensor lead is short circuited to ground, diagnostic trouble code P0131 will be generated.
- If the sensor lead is short circuited to B+, diagnostic trouble code P0132 will be generated.
- If the sensor reacts too slowly to changes in the fuel -air mixture or if its voltage transition is too far from lambda 1, diagnostic trouble code P0133 will be generated.
- If there is an open circuit on any of the leads for the sensor ground or sensor voltage, the control module will continuously read 0.45V and diagnostic trouble code P0134 will be generated.
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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