P050A - Cold Start Idle Air Control Performance
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P050A - COLD START IDLE AIR CONTROL PERFORMANCE
| Description: | The cold start emission reduction monitor has detected an airflow performance deficiency. The cold start emission reduction monitor validates the operation of the components of the system required to achieve the cold start emission reduction strategy, retarded spark timing (P050B) and elevated idle airflow (P050A). When the idle airflow test portion of the cold start emission reduction strategy is enabled, the idle air control system requests a higher idle RPM to increase the engine airflow. The cold start emission reduction monitor compares the actual airflow measured by the MAF sensor to the requested PCM airflow. The DTC is set when the airflow is less than the calibrated limit. | |||
| Possible Causes: |
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| Diagnostic Aids: | This DTC is an informational DTC and may be accompanied by other DTCs. Diagnose other DTCs first. If other DTCs are not present inspect the intake air system for air restrictions and damage. If no concerns are present, clear the DTCs and repeat the self-test. The cold start emission reduction monitor runs during a cold start. Before repeating the self-test, a 2 to 3 hour soak period is required for the cold start emission reduction monitor to run at start up. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory | |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the DTC. | |||