What are the causes of the Volkswagen Magotan P0321 fault code?

[Nora]

Volkswagen Magotan P0321 fault code causes include engine speed sensor failure, sensor wheel failure or mismatch, electronic control module (PCM or ECM) failure, etc. Engine speed sensor failure: In case of engine speed sensor failure, you can use a resistance meter to measure the resistance between the two pins of the sensor (the normal value should generally be between 0.7-1.2). If it exceeds the specified range, it indicates sensor failure, and the speed sensor should be replaced. The engine speed sensor is an inductive sensor used to identify engine speed. Together with the Hall sensor, it identifies the top dead center of cylinder 1 ignition to determine fuel injection timing and ignition timing. Solutions for the fault code: If there is truly an irreparable fault, you should go to a 4S shop for professional personnel to conduct a series of systematic checks and troubleshoot the issue.