2008 Yukon Denali P1133

[JACKFAVOR]

So my CEL came on Monday I scanned it and got P1133 bank 1 heated o2 sen. not switching. I replaced both upstream o2 sen. cleared the code all was good until this afternoon when the same code came on. Anyone know what could be causing this. The vehicle 2008 Yukon Denali 6.2 with 60245 on it.

 

Thanks

Jack

[JACKFAVOR]

Bump

[gmtech4]

the code was not diagnosed ,,,,,you guessed,,,,,that is the cause ,,,,

 

dont you have any warranty ?

 

you want us to guess for you now ?,,,could be 4 or 5 things

[txab]

Have you checked for wiring or connector issues? Vacuum leak or exhaust leak?

[JACKFAVOR]

govtech4

 

I had the code scanned at NAPA they told me it was the o2 sen. and if one was the other side would soon be going that is why I did what I did. I don't want anyone to guess I was hoping for a educated opinion.

[JACKFAVOR]

No intake or exhaust leaks were found. Nothing visibly wrong with the wiring.