Knock sensor
P0328
Knock Sensor 1 Circuit High (Bank 1 or Single Sensor)
The sensor that listens for engine knock (pinging) has a circuit fault, so the computer can't protect the engine by adjusting the timing.
Fine to drive
Can I keep driving? Yes, in most cases. It won't hurt the car in the short term, but get it fixed. A check engine light that's already on can't warn you about a new problem. It drives normally, usually with a little less power. Avoid towing and hard driving until it's fixed.
What the words mean
- Bank 1 is the side of the engine with cylinder 1. A four-cylinder engine has only one bank.
- High means the signal voltage is higher than it should be, often an open circuit or a short to power.
Common causes
- A failed knock sensor
- Wiring damage, often from heat or rodents
- A corroded connector
Listed roughly from most to least likely. The same code can have different causes on different cars.
What to do
- Use the fuel grade your manual asks for.
- Avoid hard acceleration and heavy loads until it's fixed.
- Have the sensor and wiring tested.
General guidance. Your owner's manual wins. If a red warning light is on or the car drives differently, stop safely and get help.
Related codes
- P0325Knock Sensor 1 Circuit (Bank 1 or Single Sensor)
- P0327Knock Sensor 1 Circuit Low (Bank 1 or Single Sensor)
- P0330Knock Sensor 2 Circuit (Bank 2)
Track this automatically in Tagwell Auto
Tagwell Auto keeps your car's service dates and mileage, so when a code shows up you know what was done last. With a Bluetooth reader for the car's diagnostic port (called OBD-II), the phone app can read the code itself.