This bulletin applies to 2011-2014 Jeep Compass and Patriot vehicles equipped with a 2.2L I4 engine, built on or before Sept. 19, 2013. The MIL may be on and the vehicle may be in limp mode.
DTC P2073 (manifold pressure/throttle position correlation) or P2074 (MAP/TPS correlation – high airflow/vacuum leak) or P2279 (intake air system leak) alone or along with P0400 (EGR system flow malfunction) codes may be present.
The PCM requires reflashing if the vehicle shows DTC P279, P2074, P2073 and/or P0400. The new software update removes codes P2074/P2073 which were tied to reaching a maximum correction factor on the MAF sensor. Codes P2074/P2073 were not considered needed as they are duplicated by P2279 and P0400 functions. The new software also updates the threshold for P2279 to -30% deviation from -15% to provide further insurance that there will not be a false fault code creation. The wiTECH software level must be at release 14.01 or higher.
After reprogramming, replace the air filter with the latest MOPAR certified filter which has two certification dots. Reinitialize the MAF sensor using wiTECH.
Note: reinitializing the MAF sensor using wiTECH each time an air filter is replaced is required for the 2.4L turbo diesel engine.
