Service function guideDPF Differential Pressure Sensor Service

This guide gives Auto Veteran readers a complete, professional procedure for servicing the Diesel Particulate Filter (DPF) differential pressure sensor, from understanding its role in the regeneration strategy through to resetting its learned values with a scan tool. It is written for working mechanics and experienced DIY owners who already understand basic exhaust aftertreatment and want a repeatable, diagnostic-led method rather than a parts-swap guess. You will learn how to verify sensor plausibility with live data and a pressure gauge, how to remove and refit the sensor and its hoses without introducing leaks, and how to perform the learned-value reset and confirm the repair with a road test. By the end you will be able to diagnose a faulty differential pressure sensor, carry out the service safely, and prove the result with measured data.