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Recently we noticed the mpg went down from 30 mpg to 25, than soon after that when we started the car it would stall while in park. So we would have to give it gas in order to keep it running than it would be fine. The Malfunction Indicator Light (MIL) is now on in the car and it is still stalling at start up. Doesn’t happen all the time. I am going to call the dealer tomorrow. Car has 41k miles. I am pretty sure the car still has some sort of emissions warranty. Can anyone suggest anything to me?
 

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Here's the DTC detecting condition:
• A high voltage from the sensor is sent to the ECM under light load driving condition.
• A low voltage from the sensor is sent to the ECM under heavy load driving condition.

Here's the Possible causes:
• Bad harness or connectors; MAF sensor circuit is open or shorted.
• Intake system vacuum leaks.
• Bad MAF sensor.
• Bad EVAP control system pressure sensor.
• Bad intake air temperature sensor.
 
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