A 2015 Passat TDI SEL recently experienced intermittent lurching while driving. After a flashing glow plug light appeared, a diagnostic scan revealed a P0322 code, indicating a problem with the engine speed sensor. This sensor, located near the oil filter housing, requires the oil filter’s removal for access. Coincidentally, the vehicle is due for an oil change, simplifying access for inspection and potential replacement.
The engine speed sensor, also known as the crankshaft position sensor, plays a crucial role in engine management. It monitors the rotational speed and position of the crankshaft, providing vital information to the engine control unit (ECU). The ECU utilizes this data to control ignition timing, fuel injection, and other critical engine functions. A malfunctioning sensor can disrupt these processes, leading to performance issues like lurching, misfires, or even stalling.
A P0322 code specifically points to a “No Signal” condition from the engine speed sensor. This suggests a complete loss of signal, potentially caused by a faulty sensor, damaged wiring, or a poor connection. Diagnosing the root cause involves inspecting the wiring harness for any visible damage, such as frayed wires or loose connectors. If the wiring appears intact, the sensor itself is likely the culprit.
Replacing the engine speed sensor generally involves disconnecting the electrical connector, removing the retaining bolt, and carefully extracting the sensor. The new sensor is then installed in reverse order, ensuring a proper connection and secure fit. While the repair itself is relatively straightforward, accessing the sensor can be challenging due to its location. Removing the oil filter typically provides the necessary clearance for convenient access.
Brink’s Auto, a local independent mechanic, has been scheduled to perform the repair. They will conduct an oil change concurrently, leveraging the opportunity to thoroughly inspect the sensor and associated wiring. This comprehensive approach aims to pinpoint the exact cause of the P0322 code and ensure a lasting solution. Past experiences with Hewlett VW dealership service have been positive, however, exploring independent options may prove more cost-effective now that the vehicle is no longer under warranty. This experience with Brink’s Auto will help determine if they are a reliable alternative for future maintenance and repairs.
