TSB 17-2072

Some 2017 C-MAX/Fusion Hybrid/Energi and MKZ Hybrid vehicles may exhibit an illuminated MIL with DTC P0071 stored in the powertrain control module (PCM). This DTC can be set after the vehicle is stored inside a warm location for several hours and then driven on a cold day. Under these conditions the PCM may see a temperature sensor concern when it first compares the ambient air temperature (AAT) sensor to other engine temperature sensors and set the DTC. Reprogram the PCM to the latest calibration using Integrated Diagnostic System (IDS) release 104.04 or higher. Make sure you are connected to the internet when entering module programming to obtain the latest updates. Calibration files may also be obtained at www.motorcraftservice.com.