2008 Maliblue tripping DTC

[MrMarty51]

Car has 98,000 miles on the ODO.
New AC Delco Iridium sparking plugs 350 miles ago plus new air filter.
So the first shot out of the parts cannon has been fired.
Fuel filter will be installed today.

I did not notice that (1/2) stored sign until after the codes had been cleared. I would think both codes should have been displayed on the front page.
Whats everyone think ? ? ? ?
Coils or fuel injectors next shot ?
The main problem is it dont always trip SES lamp during our trips to Billings, 150 miles one way.
This time, the wifey told me, it tripped just out of town on her drive back home, over 300 miles after she did her tours of Billings.

 

[MrMarty51]

Oh yeah. Another trip to Billings this Thursday, come back Saturday if the doc cuts me loose after pulling the rods and screws from my back.
I will dump in a couple of jugs of injector cleaner before we leave town to make this drive.

 

[ak diesel driver]

Maybe o2 sensor?

 

[MrMarty51]

Maybe o2 sensor?

Two of those, one upstream and one downstream.
Up is $40.97 and down is $53.79 through RA. Before that big discount.
Coil, $92.97
Plug wires $34.79
Fuel injectors, $69.97 ea, total $400.74, thats what the shopping cart said.
I’ll go get three jugs of Techron injector cleaner and see if that makes a difference.
I’ll also need to do a study and find where the fuel filter is located and change that out before our trip to Billings.
I’ll also have the Autell Maxi AP200 tool plugged into the ALDL port.
Vicki will be driving so I’ll set there and clear that code quick as it can rear its ugly head.