P0332: Knock Sensor 2 Circuit Low Input (Bank 2)
Can you still drive? Yes, but the ECM will retard timing on bank 2 to compensate, resulting in lower power and fuel economy. Fix it before sustained heavy towing or hauling.
What Does P0332 Mean?
Code P0332 means the knock sensor on bank 2 is outputting a voltage below the expected threshold. This is typically an electrical fault in the sensor or its circuit rather than actual engine knock. Without a functioning knock sensor, the ECM cannot protect bank 2 from detonation damage.
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
- Failed knock sensor on bank 2
- Open circuit in sensor wiring
- Corroded sensor connector
- Sensor not properly seated
- Wiring harness damage under intake manifold
Symptoms
- Check engine light on
- Reduced engine power
- Poor fuel economy
- Possible engine knock on bank 2
- Hesitation under load
Diagnostic Steps
- 1Read freeze frame data for conditions when code set
- 2Inspect bank 2 knock sensor connector
- 3Measure sensor resistance and compare to specifications
- 4Check wiring continuity from sensor to ECM
- 5Verify sensor is properly torqued to engine block
Recommended Parts & Tools
knock sensor harness
torque wrench
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $50 - $400 |
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Chat with AI About P0332Commonly Affected Vehicles
Related Recalls
1 Active Recall — 2026 GMC Yukon
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cadillac OPTIQ, Chevrolet Colorado, Equinox EV, GMC Canyon, 2026 Buick Enclave, Envision, Cadillac CT5, Escalade, Escalade ESV, Escalade IQ, Escalade IQL, LYRIQ, VISTIQ, Chevrolet Blazer EV, Corvette Convertible, Corvette Coupe, Corvette Convertible E-Ray, Equinox, Silverado 1500, 2500, 3500, Silverado EV, Suburban 1500, Tahoe, Traverse, GMC Acadia, Hummer EV Pickup, Hummer EV SUV, Sierra 1500, 2500, 3500, Sierra EV, Terrain, Yukon, and Yukon XL vehicles. The radio may not have been set to the correct status to download the electronic owner's manual during production. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, “Occupant Protection.”
Remedy: Dealers will reset the vehicle radio, which will facilitate automatic download of the electronic owner’s manual, free of charge. Owner notification letters are expected to be mailed April 13, 2026. Owners may contact GM customer service at 1-866-467-9700, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-333-4223. The manufacturer's number for this recall is N252540430. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 26, 2026.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Frequently Asked Questions
Do I need to remove the intake manifold to replace the knock sensor?
On many V6 and V8 engines, yes. The knock sensors are often located beneath the intake manifold, requiring its removal for access.
Can I drive with knock sensor codes long-term?
You can, but the ECM's timing retard reduces performance and fuel economy. More importantly, if the sensor is truly dead, actual knock could go undetected.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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