Check Engine Light With Code P0442, P0456, and/or P1450 on Ford Escape Hybrid

The Check Engine Light may illuminate with code P0442, P0456, and/or P1450. These codes are related to the EVAP system. Our technicians tell us that if no EVAP system faults are confirmed, updated software is available for the powertrain control module (PCM) which should correct this concern.

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Average mileage: 104,203 (67,000–155,000)
2 model years affected: 2008, 2009
8 people reported this problem
4 people shared problem details
About every two months we get a check-engine light and the code reader reports P0442. The mechanic it unable to find anything wrong. With the code reset, the vehicle will run find for another two months, several tanks of fuel, with no light. Then the code comes back again. Annoying, but we really love this vehicle.
Check engine light came on as my daughter was driving back from Ashville, NC. Stopped at an AutoZone/Advance Auto where they plugged in and checked the code which apparently was showing that an O2 sensor needed replacing. She dropped it off to Shelor Motor Mile yesterday, they finally got to it today. They are stating that they were unable to run the diagnostics/update the PCM software as the standard engine battery was 'weak'. Had them try another battery and now they are saying that the PCM is 'burnt out' and needs replaced. I'm suspicious at this point that they just don't have a clue how to work on a hybrid Escape. Comments?
Check engine light returns code P0442
First occurance was when external temps were between 0 - 30 degrees F. Ran smoke check and determined no leaks. Reset code and three months later code P0456 returned.
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