DTC P0506 (ISC_L) - Idle Control System Rpm Lower Than Expected
- Connect SSM. Retrieve DTC(s). If DTC P0505 is present, diagnose this DTC first. If DTC P0505 is not present, go to next step.
- Start and allow engine to idle. If there is clogging in by-pass line between by-pass hose and intake duct, repair by-pass line. If clogging is not present, replace idle air control solenoid valve.