Code result
P0328
Knock Sensor 1 Circuit High Input
High severity
What it means
The knock sensor signal voltage is above the expected range. Often caused by a sensor producing excess output due to mechanical noise (loose mounting, accessory drive vibration) rather than a sensor fault.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Mechanical noise picked up by sensor (loose accessory)
mediumA plausible cause — test and verify before replacing parts.
Signal wire shorted to supply voltage
mediumA plausible cause — test and verify before replacing parts.
Sensor failed
lowLess common, but worth ruling out after the more likely causes.
Related help
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