What do all of these codes together mean?

[chugga]

I think the cats and both o2 sensors are shot but I want you all to tell me I am not waiting my money by replacing both cats and all 4 sensors. There is an exhaust leak coming off of the header that will be re welded when I pull it all off too.

The truck runs like crap has a nasty nasty miss fire when the truck is not under load.

Here are the codes it threw.

P0161
P0174
P1174
P0160
P0300
P0306
P1300
P0308
P0305
P1668

 

[crown14]

There is an exhaust leak coming off of the header

The truck runs like crap has a nasty nasty miss fire

Fix the misfire and the exhaust leak, clear the codes then drive it, rescan it and ask us.

 

[chugga]

Ugg to fix that I have to pull everything down first lol. Mine as well replace the cats while I have the headers off.

 

[chugga]

It just started the misfire a week or so ago and it has had the exhaust leak for a year or so.

 

[robertf]

I'd inspect the wiring harness before throwing any money at it.

Do you live in an area with lots of squirrels?

 

[jymmiejamz]

The exhaust leak is probably mostly irrelevant.

The misfires could be caused by any number of things. You need to see that you are getting good spark to the cylinders that are misfiring. Did you get your mass air flow sensor wet recently?

 

[stroker]

..

 

[Keanan]

Check Fuse #2.