2016 Chevrolet P0325: What It Means & Is It Safe to Drive?
P0325 on the 2016 Chevrolet: 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 2016 Chevrolet
- 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 2016 Chevrolet, repairs for P0325 typically fall between $150 and $500, depending on the root cause and labor rates in your area.
Known issues on Chevrolet
Chevrolet P0325 on LS V8 engines (5.3L, 6.0L, 6.2L) is very commonly caused by water intrusion—the knock sensor sits under the intake manifold and the wiring harness junction connector corrodes from condensation, particularly in humid climates. GM issued a TSB for knock sensor harness corrosion on Gen IV LS engines. The repair involves replacing the harness connector with an updated sealed connector (GM part 12110027). Replacing just the sensor without addressing the harness corrosion typically results in P0325 returning.
Most commonly affected models