Hello I have a 2005 dodge magnum 3.5l sxt awd with just under 88k miles
I had it parked up for about 8 months. I finally started it up to start using it again and it had a cel of p0158. I came to determine that it was because of a rusted exhaust pipe between the 02 sensor and cat. I fixed that and now it is giving me p2099 and p0159. I did a freeze frame in park at idle (~650 rpm) and it showed that the vehicle is at 1800 rpm and the vehicle is going 55mph. Does anyone have a clue what is going on or what I should check next. Also idk if it is related but every time someone is not sitting in the passenger seat the airbag warning light turns on in the dash (not the pass indicator above the radio) this also started when I started driving it again. Thank you in advance

 

Did you put a new battery in it?

 

Yes it has a new battery and I also upgraded the factory 8 ga ground to a 0 ga.

 

freeze frame data isn't something you can initiate and its not live data...when a fault occurs and a dtc is set...the freeze frame data is data parameters at the time the fault tripped. the freeze frame data with show which code it set for.
It is used to determine the conditions the code set in....techs view it to help recreate the fault condition.