P1507moderate severityPowertrain
IAC Valve Closing Coil Circuit Open
on 2017 Hyundai Tucson 2.0L I4 · FWD
What this code means
The PCM has detected an open circuit in the IAC valve closing coil. Without the closing coil functioning, the IAC valve cannot reduce airflow to lower idle speed when needed.
Symptoms
- Check Engine Light
- High idle speed
- Idle speed does not decrease when warmed up
- Engine races at idle
Common causes
- Broken wire in IAC closing coil circuit
- Corroded IAC connector pins
- Faulty IAC valve with open closing coil
- PCM connector corrosion
- Wiring harness damage
Diagnostic steps
- Test IAC closing coil resistance
- Inspect IAC connector for corrosion
- Check wiring continuity from PCM to IAC closing coil
- Verify PCM output to closing coil
- Compare opening and closing coil resistances
Repair notes
Replace the IAC valve if the closing coil is open internally; repair wiring or connector if external.
Other Powertrain codes on this vehicle
P0001
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P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
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P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1