P1506moderate severityPowertrain
IAC Valve Opening Coil Circuit Short
on 2003 Hyundai Tiburon 2.7L V6 · FWD
What this code means
The PCM has detected a short circuit in the IAC valve opening coil circuit. This can cause the IAC valve to remain energized or draw excessive current, affecting idle speed control.
Symptoms
- Check Engine Light
- Erratic idle speed
- High idle speed
- IAC valve overheating
Common causes
- Short to ground in IAC opening coil wiring
- IAC valve internal coil short
- Chafed wiring contacting ground
- Connector with bridged pins
- Water intrusion in connector
Diagnostic steps
- Test IAC opening coil resistance (low reading indicates short)
- Inspect wiring for chafing or damage
- Check connector for bridged pins or water intrusion
- Disconnect IAC and test circuit resistance to ground
- Replace IAC valve and retest
Repair notes
Replace the IAC valve if shorted internally; repair wiring if the short is external.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
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