To and from work today and some city driving with consistent coolant temps between 185-189 F and decent 16 mpg with maybe 1/6 city miles and scanned diagnostics this eve with p0154and p0155 popping up.

Any recommendations on starting first much appreciated.

I've added some graphics from my obd2 scanner/iphone dash command if that helps analysis. Thanks in advance. Vehicle seems to be driving well and my tbh bypass seems to have solved my coolant loss issue fully.

 

That's O2 codes, though I don't remember which. I typically like to change all of mine in one fail swoop anyway.

 

Alex are the four Oxygen sensors all the same, i.e. just buy 4 of them for this vehicle model?

 

The two fronts are the same and the two rears are the same. You'll be able to easily tell the difference when installing because the plugs are different. The cheapest place I've found to get them is Amazon, but also check Advance Auto. Might be cheaper there with their online discount.

 

Did some research, amazing what a noob can learn on this site, unreal, I ordered a set of 4 from AB today.

 

cimomd, did you change your O2 sensors? Did it make a difference?