DTC P050A Cold Start Idle Air Control System Performance: Description

This monitor will run when the engine is started at -10 to 60°C (14 to 140°F) of the engine coolant temperature. The DTC will set after the engine idling for 13 seconds (2 trip detection logic)

The DTC is designed to monitor the idle air control at cold start When the engine is started at lower than 60°C (140°F) of the engine coolant temperature, the ECM measures the accumulated mass air flow at the engine idling If it does not reach the criteria within 10 seconds, the ECM interprets this as a malfunction The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving cycles (2 trip detection logic).

The electronic throttle control system controls the idle speed The electronic throttle control system operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed

NOTE: When the negative (-) battery terminal is disconnected during inspection or repairs, the idle speed control learned values are cleared. Idle speed control learning needs to be performed before this DTC can be stored.
To perform idle speed control learning, the engine must be warmed up by allowing it to idle for 5 minutes. For idle speed control learning to be successful, when the engine is started to warm it up. There must be at least 10 seconds of idling with the coolant temperature below 30°C before allowing it to continue running for the 5 minute learning period.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
P050A	Accumulated intake air amount for 10 seconds of idling after cold start is less than threshold (2 trip detection logic)	Throttle body assembly Mass air flow meter Intake system PCV hose connections VVT-iE system Air cleaner filter element ECM