P1143 – Swirl Control Valve Vacuum Cut Valve (Nissan)
Description
The ECM detected improper operation of the swirl control valve vacuum cut valve.
Want to confirm the real cause of this fault code?
A high-quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze-frame information — exactly what you need to verify the root cause of this code with confidence.
View Recommended ScannersSymptoms
- Rough idle
- Poor acceleration
- Hesitation
- Reduced power
- Check engine light
Causes
- Faulty vacuum cut valve
- Vacuum leak
- Stuck swirl flaps
- Wiring issues
Diagnosis
- Inspect vacuum lines
- Test valve operation
- Check wiring
- Scan live data
Repair
- Replace vacuum cut valve
- Repair wiring
- Fix vacuum leaks
- Clean swirl flaps
