IAC Valve Closing Coil Circuit Short
2015-2021 Kia Sedona 3.3L V6
Description
The PCM has detected a short circuit in the IAC valve closing coil circuit. This may cause the idle to drop too low or the valve to behave erratically.
Symptoms
- Check Engine Light
- Low or erratic idle
- Engine stalling
- IAC valve buzzing
Common Causes
- IAC closing coil internally shorted
- Wiring short to ground in closing coil circuit
- Damaged connector
- Water intrusion
- Chafed wiring
Diagnostic Steps
- Test IAC closing coil resistance (abnormally low indicates short)
- Inspect wiring for damage or chafing
- Check connector for water or corrosion
- Disconnect IAC and measure circuit resistance to ground
- Swap IAC valve and retest
Repair Notes
Replace the IAC valve if the closing coil is shorted; repair wiring if the short is in the harness.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1508 on Other Vehicles
Common Questions
What does code P1508 mean on a 2015-2021 Kia Sedona?
P1508 stands for "IAC Valve Closing Coil Circuit Short". The PCM has detected a short circuit in the IAC valve closing coil circuit. This may cause the idle to drop too low or the valve to behave erratically.
What are the symptoms of P1508 on a Kia Sedona?
Common symptoms of P1508 include: Check Engine Light, Low or erratic idle, Engine stalling, IAC valve buzzing.
What causes P1508 on a 2015-2021 Kia Sedona?
Common causes of P1508 include: IAC closing coil internally shorted, Wiring short to ground in closing coil circuit, Damaged connector, Water intrusion, Chafed wiring.