What does code P0325 mean on a Mitsubishi and is it safe to drive?
P0325: Knock Sensor 1 Circuit Malfunction (Bank 1). Here's what it means on your Mitsubishi, what usually causes it, what repairs typically cost, and how safe it is 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 for your Mitsubishi
- 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 Mitsubishi, repairs for P0325 often fall between $150 and $500, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Mitsubishi
Mitsubishi P0325 on 2.4L 4B12 MIVEC (Outlander, ASX, Lancer)—the knock sensor is mounted mid-block and accessible. The sensor itself is generally reliable; P0325 usually means wiring harness heat damage from the exhaust routing nearby. On Eclipse GT 3.8L 6G75 V6, the knock sensors (one per bank) are under the intake plenum; intake removal is required. On Lancer Evo X 4B11T turbocharged, a non-functional knock sensor is a critical safety issue—the Evo ECU makes aggressive timing decisions based on knock sensor feedback; replace immediately.
Most commonly affected models