P03F1
B Camshaft Profile Actuator C Control Circuit/Open Bank 1
Generic OBD-II
Real-world scan data
Seen in
76
scans in the past year
Found in
<0.1%
of scans
<0.1%
of scans that found faults
Appears alongside · share of P03F1 scans
U27B9in 69.7% of scans
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check the camshaft profile actuator control circuit for any loose or damaged connections
- Inspect the camshaft position sensor and replace if necessary
- Clean or replace the camshaft profile actuator
- Check and replace the engine control module (ECM) if other solutions don't resolve the issue
- Verify the timing belt or chain is properly aligned and functioning correctly
Common causes
Most likely first
- Faulty camshaft position actuator solenoid valve
- Low oil pressure or oil flow to the camshaft actuator
- Wiring or connection issues with the camshaft actuator control circuit
- Faulty engine control module (ECM)
- Mechanical issues with the camshaft or associated components
How to diagnose & fix
Work through it in order
- Engine misfire or rough idle
- Loss of power or acceleration
- Engine stalls or doesn't start properly
- Increased fuel consumption
- Illuminated check engine light
Read & clear P03F1 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.