Monitor Description

This monitor will run when the engine is started at an engine coolant temperature of -10 to 50°C (14 to 122°F). The DTC will be stored after the engine idles 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 an engine coolant temperature of below 50°C (122°F), the ECM measures the accumulated mass air flow during engine idling. If the accumulated mass air flow does not reach the specified level within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is stored 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:

The idle speed control learned values are cleared by performing a learned value reset. Idle speed control learning needs to be performed before this DTC can be stored.

HINT:

Idle speed control learning is performed when the engine is warmed up and has been idling for 5 minutes.

Refer to INITIALIZATION [10/2014 - 05/2019]

Fig 1: ECM Measures The Accumulated Mass Air Flow During Engine Idling

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P050A-00	Cold Start Idle Control System Performance	Insufficient mass air flow after a cold start (2 trip detection logic).	Throttle with motor body assembly Mass air flow meter sub-assembly PCV system Air cleaner filter element Intake system VVT system Wire harness or connector ECM	Comes on	DTC stored	SAE: P050A