An open or damaged wire or connector. A failed knock sensor. A loose sensor (not torqued to spec).

P0327 Knock Sensor 1 Circuit Low (Bank 1 or Single Sensor)

Q: What does P0327 mean?

P0327 means knock sensor 1's signal is too low, usually wiring or a failed sensor. The signal from knock sensor 1 is lower than it should be, as if the sensor or its wiring were open or shorted to ground.

Ignition and misfire

P0327 means knock sensor 1's signal is too low, usually wiring or a failed sensor.

The signal from knock sensor 1 is lower than it should be, as if the sensor or its wiring were open or shorted to ground.

Can I keep driving? Yes, but get it fixed soon.

Usually drivable, with some loss of power and fuel economy. Avoid heavy loads, and stop if you hear knocking.

Common causes

An open or damaged wire or connector
A failed knock sensor
A loose sensor (not torqued to spec)

Symptoms

Check-engine light
Reduced power, worse fuel economy

What to check first

Inspect the wiring and connector.
Check the sensor's resistance or output as your service information describes.
Make sure the sensor is torqued to spec.
Check for service bulletins on the knock sensor harness.

What does P0327 mean on your vehicle?

The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.

Ask iRepair about P0327

No scanner? Most auto parts stores read check-engine codes for free.

Related codes

General guidance for P0327 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.