check engine codes

[1987ss]

My 99 tahoe gets 10 mpg and my check engine light or ses is on had it scanned and the following codes came up PO141 (o2 heat bank one sensor 2 or something like that) and PO174 (fuel system to lean bank 2)
I guess im asking what or were would you start to fix problem?

[maxwedge]

I'd focus the the o2 sensor before the cat on the pass side.

[1987ss]

thanks!

[1987ss]

changed it.. is there a way to turn off ses light with out the use of a scanner to clear code?

[2000CAYukon]

Originally Posted by 1987ss

changed it.. is there a way to turn off ses light with out the use of a scanner to clear code?

If you fixed the problem, the light will go out by itself after a few trips. Otherwise, removing battery power for a few minutes can reset the light.

Note that if you remove battery power to reset the light, you may not pass a smog check right away due to the fact that the PCM needs to relearn fuel trims. This usually takes a week or so to pass smog after removing battery power.

//2000CAYukon

[1987ss]

thanks guys! the light went out!!

[susie_4]

Hey Guys withthe post for un hooking the cables and re hooking them to reset the light. I haven't tried that yet but I am going to. Thank you