6.7L Cummins Forum

I have 2007.5 Ram 2500 Quad Cab with 6.7 Cummins - 2 whl drive - 6 sp. Automatic with 36K miles. Since my last post about MIL light on. I have been back to the dealer 3 times. They found Trouble Code P2A01 - 1/2 - O2 Sensor Circuit Performance. 1st visit replaced 1/2 - O2 Sensor. Drove 20 miles MIL lite back on. Went back to dealer same code present - Dealer ordered O2 Sensor Module - went back next day to have ordered module replaced. Left dealer and drove about 20 more miles - MIL Lite back on - same code. Will be going back to Dealer for 4th time on Monday for MIL Lite on - same code. Any Suggestions??? When I look back over the history of MIL lite coming on - both O2 Sensors have been replaced 4 times and O2 Sensor Module twice. I suspect something else is causing that code to set. Does anybody have any ideas??

Do you have all of the current flashes? When I had my O2 sensor and module update done they reflashed it at that time.

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07.5 3500 Quad, SRW, 4X4, Laramie, Leathered, Dark Metallic Gray, 6.7, 68RFE, 20K Reese, Ride Rite's, 2 Viair air compressors, Bully steps, Kleinn Locomotive air horns (5 in all), Billet polished locking fuel door, 'A' pillar mount Auto Meter Pryo, PML X-deep trans pan
06 Durango 285 RL 5'er Lifted by KZ