P0331: Knock Sensor 2 Circuit Range/Performance (Bank 2)
Can you still drive? Yes, but expect reduced power and fuel economy. The ECM will retard timing on bank 2 as a protective measure.
What Does P0331 Mean?
Code P0331 indicates that the knock sensor on bank 2 of a V-configuration engine is producing a signal outside the acceptable range. Bank 2 is the side of the engine that does not contain cylinder 1. The ECM may not be able to properly control ignition timing for that bank.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty bank 2 knock sensor
- Corroded wiring or connector
- Incorrect sensor torque
- Engine mechanical noise
- Damaged sensor from coolant leak
Symptoms
- Check engine light on
- Reduced power on bank 2
- Poor fuel economy
- Pinging under load
- Sluggish acceleration
Diagnostic Steps
- 1Monitor knock sensor 2 signal with a scan tool
- 2Inspect sensor connector and wiring on bank 2
- 3Verify sensor mounting torque to specification
- 4Check for coolant leaks near the sensor location
- 5Compare bank 1 and bank 2 knock sensor readings
Recommended Parts & Tools
knock sensor wiring harness
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $75 - $450 |
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Frequently Asked Questions
What is bank 2?
Bank 2 is the side of a V-type engine that does not contain cylinder 1. On most vehicles, bank 1 is the driver's side and bank 2 is the passenger's side, but this varies by manufacturer.
Can coolant damage a knock sensor?
Yes, knock sensors mounted on the engine block can be damaged by coolant leaks from head gaskets or intake manifold gaskets.
Community Fix Reports
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