P0328 Mazda -

Question

My engine check sign comes on for a day or two and then disappears should I be worried about this

Answer 1

P0328 Knock sensor circuit high input

Yes you should be concerned about this code condition, circuit high code tends to suspend any other potential code from appearing. P0328 this is more of a intermittent connection for the knock sensor with its harness. or a malfunction of the knock sensor.