2010 Honda P0325: What It Means & Is It Safe to Drive?
P0325 on the 2010 Honda: Knock Sensor 1 Circuit Malfunction (Bank 1). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The PCM isn't receiving a valid signal from knock sensor 1. Without knock feedback, the PCM retards ignition timing as a safety measure, reducing power and economy.
Common causes on the 2010 Honda
- Failed knock sensor
- Corroded or broken wiring/connector at the sensor
- Actual engine knock from carbon buildup or low-octane fuel
Symptoms
- Check Engine Light
- Reduced power and fuel economy (PCM retards timing)
- Possible audible knock or ping under load
Typical fixes
- Replace knock sensor
- Repair wiring and connector
- Use correct octane fuel and address carbon buildup
Repair cost range
For a 2010 Honda, repairs for P0325 typically fall between $150 and $500, depending on the root cause and labor rates in your area.
Known issues on Honda
Honda P0325 on J-series V6 engines (Accord, Pilot, Odyssey) is typically caused by the knock sensor connector corroding—the sensor itself rarely fails, but the two-pin connector at the top of the engine corrodes from moisture. Clean and re-pin the connector before replacing the sensor. On four-cylinder K-series engines, P0325 is less common; check the harness routing near the exhaust manifold heat shield where it can chafe.
Most commonly affected models