P0506 – Idle Control System RPM Lower Than Expected
Description
The engine idle speed is lower than the ECU expects.
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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
- Low idle
- Rough idle
- Stalling
- Hesitation
- Check engine light
Causes
- Vacuum leaks
- Dirty throttle body
- Faulty IAC valve
- PCV valve issue
- Air intake leak
Diagnosis
- Inspect vacuum lines
- Clean throttle body
- Test IAC valve
- Check PCV system
- Smoke test intake
Repair
- Fix vacuum leaks
- Clean throttle body
- Replace IAC valve
- Replace PCV valve
- Repair intake leaks
