Jeep Grand Cherokee 2021 — technical service bulletin
Bulletin 0800722 · NHTSA communication 10222978 · issued Jan 12, 2022
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
Flash: Body Control Module (BCM) Updates This bulletin involves reprogramming the BCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC). When the ambient air temperature sensor voltage goes to 0 volts (shorted to ground), the BCM sets a P0073 - Ambient Air Temperature Sensor Circuit High for this condition. The BCM should display P0072 - Ambient Air Temperature Sensor Circuit Low instead. The customer may also experience one or more of th
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.