P0328 - Knock Sensor 1 Circuit High Input (Bank 1)

Knock sensor 1 signal is too high on bank 1.

Code Overview

Knock sensor 1 signal is too high on bank 1.

Common Causes

• Open circuit
• Sensor fault
• Wiring issue
• Excessive noise or detonation

Diagnostic Steps

1. Inspect for an open or broken sensor lead
2. Check for true spark knock under load
3. Verify connector fit and harness condition

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.