P0333: Knock Sensor 2 Circuit High Input (Bank 2)

What does P0333 mean?

Knock sensor 2 on bank 2 gives an above-limit input. The controller may be reacting to an electrical fault or to excessive vibration rather than a simple sensor failure.

Generic OBD-II definition: Knock Sensor 2 Circuit High Input (Bank 2). Confirm applicability in your vehicle service information.

Common causes

• Signal shorted to voltage
• Loose or failed sensor
• Electrical interference or real engine knock

Symptoms

• Check engine light
• Hesitation or reduced power
• Possible pinging or unusual engine noise

Diagnostic focus

Compare the event with engine load and RPM. A constant high electrical input at rest requires a different investigation from vibration-related spikes during combustion.

Can I keep driving with P0333?

Severity: Medium Avoid hard acceleration and heavy engine loads until diagnosed. If there is loud knocking, an oil-pressure warning, or overheating, stop the engine and arrange inspection rather than continuing to drive.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

• Inspect bank 2 wiring for contact with power circuits
• Check mounting and any audible mechanical noise
• Use the specified signal test to confirm the cause

Sources & review

• OBD-Codes.com: P0333
• TroubleCodes.net: generic code definitions

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.