2003 Ford F-250 Super Duty Q&A

2003 Ford F-250 Super Duty Question: knock sersor

how do you check if a knonk sersor is bad do you need to take off the maniflod to do it dom1967@comcast.net thank tou -
Answer 1
The only method that I know how to diagnose a knock sensor is to monitor the sensors output with a capible scan tool while operating the vehicle. I habe seen failures of the knock sensors from a rodent that has crawled under the intake and chewed into the wiring. -
Answer 2
Standard knock sensors can be tested by tapping near the sensor and checking timing on a scan tool,Or you may hear an rpm change.Pezoelectric knock sensors cannot be tested the way. -