OBD-II Generic Automotive Error Code P0328: How to Fix It

Q: What does OBD2 code P0328 mean?

P0328 means the engine control module has detected a high voltage signal from the knock sensor 1 circuit, indicating a potential sensor or wiring fault.

Q: Can I drive with a P0328 code?

You can drive short distances, but performance may decrease and fuel economy may suffer. Extended driving with this code can lead to engine damage due to improper ignition timing.

Q: How much does it cost to fix P0328?

DIY cost is around $50-$150 for a new knock sensor and tools. Professional repair can range from $200 to $500 depending on labor rates and sensor accessibility.

Q: Where is the knock sensor located?

The knock sensor is typically bolted to the engine block or intake manifold, varying by vehicle make and model. Consult your service manual for exact location.

Q: What causes a high input on knock sensor circuit?

Common causes include a faulty knock sensor, damaged wiring, loose connector, or a PCM issue. Excessive engine noise (e.g., from worn bearings) can also trigger the code.

Abstract

Error code P0328 indicates that your vehicle's powertrain control module (PCM) has detected a high voltage signal from the knock sensor 1 circuit. This usually points to a faulty knock sensor, wiring issues, or a loose connection. While the car may still run, ignoring it can reduce engine performance and fuel economy.