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.
Functional description
The ethanol sensor measures the ethanol content and temperature of the fuel. The dielectric conductivity (= conductivity of a material regarding electrical fields) as well as the electrical conductivity and temperature are determined to achieve a result. After the ethanol content has been calculated, it and the temperature are communicated to the engine management ECU by means of a PWM signal.
2 electrodes form a sensor cell that detects the dielectric conductivity when a current is applied.
| Item | Explanation |
|---|---|
| 1 | Ethanol sensor |
| 2 | three-pin plug connection |
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.