P1505moderate severityPowertrain
IAC Valve Opening Coil Circuit Open
on 2016 Hyundai Tucson 2.0L I4 · FWD
What this code means
The PCM has detected an open circuit in the IAC valve opening coil. The idle air control valve uses separate coils for opening and closing; the opening coil circuit is not completing the electrical path.
Symptoms
- Check Engine Light
- Low idle speed
- Engine stalling at idle
- Rough idle
- Engine dies when coming to a stop
Common causes
- Broken wire in IAC opening coil circuit
- Corroded IAC connector
- Faulty IAC valve with open coil winding
- PCM connector issue
- Poor ground connection
Diagnostic steps
- Test IAC valve opening coil resistance with multimeter
- Inspect IAC connector for corrosion or loose pins
- Check wiring continuity from PCM to IAC opening coil
- Test PCM output to IAC opening coil
- Check ground circuit
Repair notes
Replace the IAC valve if the opening coil is internally open; repair wiring or connector if the external circuit is at fault.
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
Fuel Volume Regulator Control Circuit High
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