Exhaust back pressure sensor defective (diesel particulate filter)
The diesel particulate filter reduces emissions in exhaust gases.
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Potential Causes
- Spare parts
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Potential Causes
- Spare parts
- Work time
max.
Potential Causes
- Spare parts
- Work time
max.
Potential Causes
- Spare parts
- Work time
max.
Potential Causes
- Spare parts
- Work time
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Probability
Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made
HIGH
Typical consequences
If this defect is detected, it may lead to the following problems:
- Exhaust system damage
- Failure of the exhaust emission test (Failure to pass the exhaust emission test)
Function of the exhaust gas back pressure sensor
The exhaust backpressure sensor is located in the exhaust system just upstream of the diesel particulate filter. It measures the exhaust gas back pressure in the exhaust gas stream flowing from the turbocharger to the diesel particulate filter. This sensor continuously measures the exhaust backpressure and sends the measured values to the engine control unit.
If the measured value does not correspond to the target specifications, this often indicates a clogged diesel particulate filter. A DPF warning lamp then appears in the speedometer. As the DPF becomes clogged over time, it is burned free at regular intervals. The combustion ("regeneration") mainly produces carbon dioxide (CO2) and water vapor. A small residue of particles remains in the filter as ash.