P0325 Ford Bronco Sport
Knock Sensor 1 Circuit Malfunction (Bank 1) · Powertrain Code · Medium · Repair: Moderate
What is P0325?
The knock sensor 1 on bank 1 is not functioning properly. The ECM cannot detect engine knock/detonation.
When the Ford Bronco Sport triggers code P0325 (knock sensor 1 circuit malfunction (bank 1)), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Ford Bronco Sport.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Ford Bronco Sport.
Common Causes on Ford Bronco Sport
- Failed knock sensor (bank 1) — heat cycling degrades the sensor over time
- Corroded knock sensor connector or wiring
- Knock sensor not torqued to spec after previous service
- Engine mechanical noise being misinterpreted as knock
Symptoms
- Check engine light
- Reduced engine performance (PCM retards timing as a safety measure)
- Slightly lower fuel economy
- No audible symptom in most cases
Notes for Ford Bronco Sport
Knock sensors on Ford V6 and V8 engines are buried under the intake manifold — the part is cheap but labor is significant.