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

DTC DETECTING CONDITION AND POSSIBLE CAUSE

Item	Detecting Condition	Possible Cause
DTC Strategy	Rationality check, low	Poor connection Clog in intake air system Carbon pile ISCA ECM/PCM
Enable Conditions	Vehicle speed = 0 Coolant temperature > 70°C (158°F) Intake air temperature > -7.5°C (18.5°F) Altitude ≤ 3000m (9841ft) Idle status Idle controller I part = 15.0% Engine load ≤ 35%
Threshold Value	Desired engine speed - Engine speed > 100rpm
Diagnostic Time	8 sec
MIL ON Condition	2 driving cycle