P0330: Knock Sensor 2 Circuit (Bank 2)
5 vehicles · 4 makes · $150-$1,200 repair
Most Reported On
P0330 is an OBD-II diagnostic trouble code meaning “Knock Sensor 2 Circuit (Bank 2).” This powertrain code means the engine computer detected a malfunction in the circuit for knock sensor 2, located on engine bank 2 (the cylinder bank not containing cylinder 1). The knock sensor listens for engine 'knock' or 'ping' (abnormal combustion) and lets the computer retard ignition timing to prevent engine damage. This code indicates an electrical/circuit problem with the sensor signal, not necessarily actual knocking. Drivability is often normal, but the engine may run with conservative timing, reducing power and economy and risking damage if real knock occurs. This code is most commonly reported on 2000-2006 Chevrolet Silverado 1500, 2000-2006 GMC Sierra 1500, and 2000-2006 GMC Yukon XL, plus 2 other vehicles, with repair costs ranging from $150 to $1,200.
Common Causes
Typical Repair Cost
Based on 5 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0330, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (5)
FAQ
What does P0330 mean?
P0330 stands for "Knock Sensor 2 Circuit (Bank 2)." This powertrain code means the engine computer detected a malfunction in the circuit for knock sensor 2, located on engine bank 2 (the cylinder bank not containing cylinder 1). The knock sensor listens for engine 'knock' or 'ping' (abnormal combustion) and lets the computer retard ignition timing to prevent engine damage. This code indicates an electrical/circuit problem with the sensor signal, not necessarily actual knocking. Drivability is often normal, but the engine may run with conservative timing, reducing power and economy and risking damage if real knock occurs.
What are the most common causes of P0330?
The most common causes of P0330 are: Faulty knock sensor on bank 2, Damaged or corroded knock sensor wiring/connector, Open or short in the knock sensor circuit, Loose or improperly torqued knock sensor, Engine ground or shielding issues affecting the signal, Faulty engine control module (rare). The specific cause varies by vehicle.
How much does it cost to fix P0330?
Repair costs for P0330 range from $150 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by P0330?
Au7o has documented P0330 across 5 vehicle models from 4 manufacturers: Chevrolet, GMC, Hyundai, Toyota.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.