This bulletin applies to 2009 Jeep Commander models equipped with a 3.7L V6 Magnum engine and automatic transmission. The MIL may be on, with DTC P013A (O2 sensor 1/2 slow response – rich to lean) and/or P013C (O2 sensor 2/2 slow response – rich to lean) stored in the PCM.
The fix involves selectively erasing and reprogramming the PCM with new software. The wiTECH software level must be at release 10.03 or higher.
Using a scan tool (wi TECH) with the appropriate diagnostic procedures available in TechCONNECT, verify that all engine and transmission systems are functioning as designed. If DTCs other than those listed here are present, record and repair as needed before proceeding.
Reprogram the PCM with the latest software. Follow the detailed procedures available in DealerCONNECT/TechCONNECT. Refer to Group 8 – electrical > electronic control modules – service information > module – Powertrain control > standard procedures > PCM/ECM programming – gas.
After PCM reprogramming, clear any DTCs that may have set in other modules. Type the necessary information on an authorized modifications label and attach it near the VECI label.