DTC P0506 Idle Air Control System-Rpm Lower Than Expected: DTC Detecting Condition

DTC DETECTING CONDITION

Item	Detecting Condition	Possible Cause
DTC Strategy	Determines if a low idle condition exists.	Poor connection Intake/Exhaust system for blockage Throttle plate for carbon deposits Faulty ETS motor Faulty TPS Faulty ETS system Faulty PCM
Enable Conditions	Normal Idle conditions Canister Purge Fuel Flow ≤ 100 Barometric Pressure > 72kPa Engine running ≥ 2 sec. Air Intake Temperature ≥ -20°C (-4°F) Coolant Temperature ≥ 0°C (32"F) 11V ≤ Ignition Voltage ≤ 16V Above conditions met period > 3 sec.
Threshold value	Real engine speed - Target engine speed < -100rpm
Diagnosis Time	Continuous
MIL On Condition	2 driving cycles