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 signal from the fuel tank pressure sensor serves as a control variable for the activation of the fuel tank non-return valve, which is located in the ventilation line between fuel tank and carbon canister.
The sensor signal is also used for monitoring the fuel tank non-return valve by the on-board diagnosis.
The pressure is measured by a piezo element which is embedded in gel. The fuel tank pressure sensor measures the absolute pressure in the fuel tank. The temperature in the fuel tank is measured according to the PTC principle.
| Item | Explanation |
|---|---|
| 1 | Electronic fuel pump |
| 2 | Fuel tank pressure sensor |
| 3 | 3 contact pins |
| 4 | Service cap |
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.