i think i got some codes what do they mean........it blinked 5 pause then 2 pause then 2 so maybe a 522,or a 5 or a 22, or a 52 and a 2 idk

 

ok the 522 was my fault....lol didnt press the clutch during koeo test.... new codes that i got were a 12 and a 13. i am doing the koer test right now

 

koer i got a 172 and a 225

 

Niether are KOEO codes.

 

#172/ o2 senor fault/lean. How old's your sensor. #225/ knock senor fault @ WOT. Did you rev the engine once during test?

 

well where does the 12 and 13 come from. i just did koer test again and only 172 comes up. the 225 went away i didnt press the gas peddle all the way down.

so how did i get a code 12 and 13 with koeo and a 172 koer

 

the oxygen sensor looks new. i pulled it out a few months back to see if the cats were bad. how can i test the oxygen sensor to see it it is bad.. the truck smells like it is running rich

 

Sounds confusing!!

 

12&13/ rpm @ idle wrong. There is no idle during KOEO. 172 notorious for when 02's go. Not sure if you can test it. I think you need something the can check switching of the sensor. What's your fuel pressure look like? I change my o2 at 35k. 60k is defiantly due.