DTC P050A: Cold Start Idle Air Control System Performance [08/2013 - ]: 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 lower than 50°C (122°F), the ECM measures the accumulated mass air flow at engine idling. If it 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 ETCS (Electronic Throttle Control System) controls the idle speed. The ETCS operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
When performing the Learning Value Reset* during inspections or repairs, the idle speed control learned values are cleared. This DTC cannot be stored with the idle speed control learned values cleared.
HINT:
The idle speed control learning* is performed when the engine is warmed up and has been idling for 5 minutes.
*: Refer to Initialization. Refer to INITIALIZATION [08/2013 - ] .
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P050A | Insufficient mass air flow at cold start (2 trip detection logic) |
|