This bulletin applies to 2009-2011 Dodge Nitro models equipped with a 3.7L engine and automatic transmission, built before Feb. 23, 2011.
A MIL may be on, with DTC P0401 (EGR System Performance) stored in the PCM. No other symptoms may be noted.
The fix involves selectively erasing and reprogramming the PCM with new software, with the wiTECH software at release 12.01 or higher.
Using a scan tool (wiTECH) with the latest software, clear any DTCs that may have set in other modules. Type the necessary information on an authorized modification label (P/N 04275086AB) and attach it near the VECI label.