P1177 – Swirl Control Valve Position Sensor Range/Performance (Nissan)
Description
The ECM detected a swirl valve position sensor signal outside the expected range.
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A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.
Compare Diagnostic ScannersSymptoms
- Rough idle
- Poor acceleration
- Hesitation
- Reduced power
- Check engine light
Causes
- Faulty sensor
- Stuck swirl flaps
- Vacuum leak
- Wiring issues
Diagnosis
- Test sensor output
- Inspect swirl flaps
- Check wiring
- Scan live data
Repair
- Replace sensor
- Repair wiring
- Fix vacuum leaks
- Clean swirl flaps
