P0326 - Knock Sensor 1 Circuit Range/Performance (Bank 1)

Knock sensor 1 signal is outside expected range on bank 1.

Code Overview

Knock sensor 1 signal is outside expected range on bank 1.

Common Causes

• Knock sensor fault
• Loose sensor mounting
• Wiring issue
• Actual engine knock or mechanical noise

Diagnostic Steps

1. Inspect sensor connector and harness routing
2. Verify the sensor is properly torqued if accessible
3. Rule out obvious spark knock or mechanical noise

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.