P1104 – IAC Circuit Intermittent
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Symptoms
- Rough idle
- Stalling
- Hesitation
- Low idle
- Check engine light
Causes
- Faulty IAC valve
- Vacuum leak
- Wiring issue
- Dirty throttle body
- Connector issue
Diagnosis
- Inspect wiring
- Test IAC valve
- Clean throttle body
- Check vacuum lines
- Scan live data
Repair
- Replace IAC valve
- Fix vacuum leaks
- Clean throttle body
- Repair wiring
- Fix connectors