O2 Sensor low voltage??

[Charby]

Every time im some what hard in my truck like beat the other car when the light turns green i throw 2 engine codes both o2 sensor low voltage, i replaced one o2 changed battery and alternater and it still does it, when it goes on my truck shifts like crap supper laggy shifts!, any idea how to fix this?? It drives me nuts!! Thanks guys

 

[SAATR]

Well, is the code for the upstream or downstream sensors (B1S1 & B2S1 or B1S2 & B2S2)? Sounds like a wiring (specifcally a ground) issue. Check your chassis grounds and make sure the harness going to your sensors is not chafed anywhere, like where it's strapped to the frame.

 

[DRAGGIN95]

Also what year is the truck and what engine?

 

[Charby]

Its a 98 with a 5L, its fine if i clear it and drive normal but as soon as i pass a few prople on the highway it comes on