Trouble code P0332-Knock Sensor 2 Circuit Low refers to the knock sensor on bank 2 giving off a low voltage (less than 0.5V). The knock sensor detects unwanted explosions in the engine block and reports them to the ECU.
P0332 quick overview
| Meaning | P0332: Knock Sensor 2 Circuit Low (Bank 2) |
| Is it serious? | This code is moderately serious. While you can drive with it, prolonged ignoring may lead to engine damage due to improper fuel-air mixture adjustments. |
| Possible causes | Faulty knock sensor on Bank 2 Damaged or corroded wiring or connectors Rarely, a faulty ECU/PCM |
| How to diagnose? | Clear the Code: Erase the code using an OBD2 scanner and see if it returns after driving. Inspect Wiring: Visually check the wiring and connectors for the knock sensor on Bank 2 for any damage or corrosion. Test Sensor Voltage: Use a multimeter to test the voltage and ground inputs to the knock sensor. Check Sensor Resistance: Remove the sensor and measure its resistance; it should be above 0.5 ohms. Use Oscilloscope: Test the sensor’s response to vibrations using an oscilloscope to ensure it’s functioning correctly. |
P0332 Meaning
The P0332 code indicates that the knock sensor on Bank 2 is sending a lower than expected voltage signal to the ECU. This sensor detects unusual vibrations in the engine that might indicate knocking, allowing the ECU to adjust the fuel-air mixture to prevent engine damage.
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