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 diesel particulate sensor consists of a measuring probe and evaluation electronics.
Deposited soot particulates form electrical paths between electrodes on which a current flows. This signal is evaluated by the evaluation electronics. From this, the evaluation electronics determines the functional capability of the diesel particulate filter to store particulates.
The evaluation electronics forwards these signals to the Digital Diesel Electronics (DDE). The evaluation electronics of the diesel particulate sensor communicates with the engine control via a local CAN bus.
The measuring probe is regularly regenerated by heating up. The deposited soot particulates are then burnt off.
| Item | Explanation |
|---|---|
| 1 | Measuring probe of the diesel particulate sensor |
| 2 | five-pin plug connection |
| 3 | Evaluation electronics of the diesel particulate sensor |
| 4 | 4-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.