Hello everyone
I have a 2014 R/T AWD V6. I had it in for undercoating a few weeks back. When I got it back and used it, it was running rough and tossed various codes (P0174 system too lean bank 2 countless times, P2099 post catalyst fuel trim system too rich bank 2 a few times and P2097 post catalyst fuel trim system rick bank 1 only once). I monitored the O2 sensors on my reader and seen that the bank 2 sensor 1 was not responding (flat lined). I changed that sensor and all those codes went away. 2 days after changing it I got a new code. P219B DTC definitions not found! Refer to vehicle service manual. I googled it and it said that it's an air fuel mixture ratio imbalance on the bank that doesn't have cylinder 1. Further googling it led me in many many directions. Some places saying that the injectors are dirty, some saying that an engine replacement is required. But I did read about some conditions O2 sensors can cause and it seems that they can cause air fuel imbalance. I started thinking it was funny that I got that code after I put in a new sensor so I read the live data on it. The new sensor does read the same as bank 1 sensor 1 on the low end 0.055 volts, but it doesn't go as high as the bank 1, as it tops out at 0.755 volts and bank 1 tops out at 0.875 volts. Through some reading, some people suggest changing sensors in pairs and some say changing all at once. Cheapest sensors I can find in my area is $100, so it's a costly adventure to take on if it's not going to fix my problem. I was wondering if anyone could shed some light in this for me, or if they have had the same problem and know of the fix. Any advice would be greatly appreciated. Thanks to all who read and to those who help out! Cheers
