P0333 Code: Knock Sensor 2 Circuit High Input (Bank 2)
🟠 Moderate severity · drivable
Drivable, but the computer can't detect knock on bank 2 and may reduce power, so fix it soon.
What P0333 means
Knock sensor 2 on bank 2 is sending a voltage that's too high. The sensor listens for engine knocking and the computer uses that signal to adjust timing. A high reading usually means the sensor or its wiring is faulty.
Symptoms
- Check engine light is on
- Reduced power
- Engine pinging under load
- Poor fuel economy
Common causes
- most common: Faulty knock sensor
- common: Open or damaged sensor wiring
- common: Loose or corroded connector
- less common: Excessive engine mechanical noise
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the knock sensor | Yes | $50–200 |
| Repair open sensor wiring | Mechanic | $50–150 |
| Clean and tighten the sensor connector | Yes | $0–10 |
Frequently asked questions
Can I drive with a P0333 code?
Yes, but you may notice reduced power or pinging. Fix it soon.
What is the most common cause of P0333?
A faulty knock sensor on bank 2 reading high voltage.
How much does it cost to fix a P0333?
Typically $50–$200 for a new knock sensor.
Related codes
P0328
P0328 Code: Knock Sensor 1 Circuit High Input (Bank 1)
P0330P0330 Code: Knock Sensor 2 Circuit Malfunction (Bank 2)
P0332P0332 Code: Knock Sensor 2 Circuit Low Input (Bank 2)
Related guide: The 10 Most Common Check Engine Codes →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.