Hello,
Complete tune-up, very well maintained at 205k miles, vacuum is good, scanner data looks good except my LTFT's on both banks. Main codes throwned is p0171. My temp on inlet before catalytic converter is WAY hotter than outlet by atleast 200° degrees- is that suspect? Also, can someone please look at my attachment and let me know what it indicates to, my LTFT B1 and LTFT B2 are exactly opposing each other @ 2000+ rpm, also, LTFT B1 is around 12+ and LTFT B2 Is around 1-4+ @ idle. All the help would be very much appreciated.
Thanksl

 

Before you do anything, you need to determine why you are reading "0" for short term fuel trim on bank 1. I would suggest you make sure the O2 sensor is connected and functioning. If, for example, it is telling the PCM it doesn't need addl fuel like when pulling a hill, Motor can 't deliver needed power to climb hill..