DTC Detecting Condition and Trouble Area

P050A, P50B DTC DETECTING CONDITION CHART

DTC detecting condition	Trouble area
P050A: Cold Start Idle Air Control System Performance This DTC is detected if any one of the following conditions is met. Difference between command duty of IAC and reference duty of IAC is out of range (-20% through +35%) for 10 sec. at cold starting. Command duty of IAC is 1% or 99% at cold starting. (2 D/C detection logic)	Air intake system PCV valve and/or hose Exhaust system Throttle body assembly and/or its circuit ECT sensor and/or its circuit Ignition system EVAP system Engine compression Engine vacuum Valve clearance Valve timing ECM
P050B: Cold Start Ignition Timing Performance Difference between commanded ignition timing and reference ignition timing is out of specified range (1° through 20°) for 10 sec. at idle speed and cold starting. (2 D/C detection logic)