Symptoms of P0328 OBD II Trouble Code
- MIL (Malfunction Indicator Lamp) illumination
- Audible knocking from the engine compartment
- Pinging from engine under acceleration
- Loss of power
- Irregular RPM
Common Causes of P0328 OBD II Trouble Code
- Knock sensor connector is damaged
- Knock sensor circuit is open or shorted to ground
- Knock sensor circuit is shorted to voltage
- Knock sensor has failed
- Loose knock sensor
- Electrical interference in circuit
- Low fuel pressure
- Incorrect fuel octane
- Mechanical engine problem
- Failed/faulty PCM
Severity of P0328 OBD II Trouble Code
A P0328 code is a generic DTC, thus it applies to all makes of vehicles, and refers to a high output voltage of the knock sensor. In many cases, this means the voltage is above 4.5V but that specific value depends on the specific make and model of vehicle. This code refers to the sensor on bank #1.