Jeep Wrangler Needs a Software Update
When updating the software on these 2012 Jeep Wranglers, be sure to install a battery charger to keep the voltage steady between 13.2 and 13.5 volts.
This bulletin applies to 2012 Jeep Wrangler vehicles equipped with a 3.6L engine.
The MIL may be on, with DTC P0108 (manifold absolute pressure sensor circuit high) set active or stored. Updating the software with release 13.01 or higher will resolve the issue. Be sure to install a battery charger to prevent battery voltage dropping below 13.2 volts or rising above 13.5 volts during the reprogramming process. Clear all DTCs following the re-flash.