Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID)DTC DIAGNOSISDTC P050A: - COLD START IDLE AIR CONTROL PERFORMANCE
2009 Mercury Milan Premier, 3.0 1, AWD
DTC P050A: - Cold Start Idle Air Control Performance
2009 Mercury Milan Premier, 3.0 1, AWDSECTION DTC P050A: - Cold Start Idle Air Control Performance
DTC 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 mass air flow (MAF) sensor to the requested powertrain control module (PCM) airflow. The DTC sets 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. | ||
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.