p0327
Moderate
Cadillac · Sedans
Knock Sensor 1 Circuit Low
Quick Answer
Error code P0327 on your Cadillac Sedans means: Knock Sensor 1 Circuit Low. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Locate knock sensor on engine block
2
Inspect wiring and connector for damage
3
Test sensor resistance with multimeter
4
Check sensor mounting and tightness
5
Replace knock sensor if faulty
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Knock sensor
Wiring harness
Connector
Wrench set
Related Error Codes