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.
2011 Saab 9-3X AutomaticFACTORY OEM SERVICE PROCEDURE
Ethanol sensor: Connection
Ethanol Sensor Pin Identification
| Pin | Signal Type | Description |
|---|---|---|
| 1 | Ground | Sensor ground to grounding point G7 via J40 |
| 2 | Square wave with varying frequency | The sensor's signal to the ECM, the square wave's frequency varies with the current ethanol content in the fuel. |
| 3 | Power supply +15 | Sensor voltage supply +15 from fuse 8 in 342 |
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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