I have an '02 silverado with the 4.8l engine and I am getting a P0332 code "knock sensor signal frequency outside normal range". I have cleared it several times but it comes back withing a few minutes. Does this mean the sensor is bad or is it telling me the engine is knocking? The sensor is under the intake manifold so it is a faily big job to replace it. What else should I look at? Thanks for any help.
Well, listen to the engine. Do you hear it knocking? If not, it is either the sensor, or the sensor is falsing on some other new high frequency vibration source.
--scott
I saw a service bulletin on that code for your vehicle. It said the problem might be caused by water getting into the rear knock sensor cavity.
The correction is to replace the rear knock sensor. There is a procedure, you might talk to the service department of your local GM dealership, maybe they will give you a copy of the service bulletin.
The code may be caused by something else, I just happened to see that bulletin.
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.