P0332Ignition System
Knock Sensor 2 Circuit Low (Bank 2)
P0332 means the knock sensor circuit on bank 2 reads a low voltage. Common causes are a short to ground, a failed sensor, or wiring problems.
🚗 Driveable but the ECM may retard timing, cutting power and economy. Diagnose promptly to protect the engine.
Is P0332 really the problem on YOUR car?Get a free AI diagnosis ranked by probability for your exact year, make, and model.
Run Free Diagnosis →
🎯 Top Causes, Ranked by Likelihood
#1Faulty knock sensor$50-$400
An internally shorted sensor reads low.
#2Short to ground in wiring$50-$300
A grounded signal wire pulls voltage low.
#3Connector corrosion$20-$150
Corrosion shifts the signal voltage.
🩺 Common Symptoms
- Check engine light
- Reduced power
- Poor fuel economy
- Pinging under load
- Retarded ignition timing
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.
🔧 How to Diagnose P0332
1Read bank 2 knock sensor live data
2Inspect the signal wiring for shorts to ground
3Check the connector for corrosion
4Replace the knock sensor if shorted
❓ Frequently Asked Questions
Can I drive with P0332?
Usually yes, but the ECM may retard timing and cut power. Diagnose promptly to protect the engine.
What is the most common cause of P0332?
A faulty knock sensor or a short to ground in the wiring are the most common causes.
How much does P0332 cost to fix?
A knock sensor typically runs $50-$400, though labor can be high if it sits under the intake.
🔗 Related Codes
Don't guess. Know exactly what's wrong.AmpAuto's AI ranks the real causes for your specific vehicle in 30 seconds.
Diagnose P0332 Free →