Knock Sensor 2 Circuit High Input (Bank 2)
This code indicates a high input signal from the knock sensor on bank 2.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The knock sensor monitors engine vibrations to detect knocking or pinging. If it sees too much voltage, which usually happens if the sensor is shorted or damaged, it triggers this code.
What the computer is actually seeing
The engine control module (ECM) expects a voltage signal from the knock sensor between 0.5V and 3.0V. Higher than that might indicate a problem.
What a healthy reading looks like
Knock sensor voltage should be between 0.5V and 3.0V during normal operation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the knock sensor wiring and connector for damage or corrosion. Repair as needed. Decision point: If repaired, clear the code and test drive. Did the code return? If yes, proceed to next step.
- 2Use a multimeter to check the voltage at the knock sensor signal wire. Expect 0.5-3.0V with engine running. Decision point: If voltage is out of this range, replace the sensor. If within range, proceed to next step.
- 3Check the connector terminals for proper contact. Tighten or repair the connector as needed. Decision point: If replaced, clear the code and test drive. Did the code return? If yes, proceed to next step.
- 4Inspect engine for signs of detonation or pre-ignition. Check fuel quality, ignition timing, and air/fuel mixture. Decision point: If you find issues, address them before considering the replacement of other components.
Common causes
- Faulty knock sensor
- Wiring issues (shorts or opens)
- Connector problems
- Engine mechanical issues (detonation)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you may continue driving but should fix it soon to prevent engine damage.
Will this code come back?
If the underlying issue isn't fixed, yes, it can return after clearing the code.
Why does this code pair with P0325?
P0325 indicates a similar issue with the knock sensor circuit but for bank 1, commonly occurring together due to shared wiring or similar faults.
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