The knock sensor signal is below the expected range. The driver may notice weak power or higher consumption.
Causes vary by car. Test before you order a part.
Likely causes, most common first
- Open or shorted wiring
- Faulty knock sensor
- Loose sensor mounting
- Corroded connector
Parts usually involved
- Knock sensor Find at suppliers
- Sensor connector Find at suppliers
- Wiring harness Find at suppliers
Test before you replace
Check the wiring, connector and mounting torque before fitting a new sensor.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.