so i had my LTs installed had the O2 extensions connected. didnt delete my rears yet so obviously i got engine codes. i have the codes reader and something weird showed up! i got these 5 codes:

PO131: low voltage bank 1 sensor 1

PO134: circut insufficient activity bank 1 sensor 1

PO135: heater performance bank 1 sensor 1

PO154: circut insufficient activity bank 2 sensor 1

PO155: heater performance bank 2 sensor 1


ok i know they are all for oxygen sensors. but i have connected the front O2s why am i getting low voltage on them ? also how to fix this ? and will it effect my performance ? or just MPG? thanks.

EDIT: also, i noticed my car is running a lil bit rough at WOT but this happened yest. and these codes were on the car the moment i had mt LTs installed? i went to a local shop (friend) he said its my spark plugs wires. but am leaning towards bad O2s? am really confuced..

 

I would recommend installing spacers on your O2 sensors and see what happens from there. I did that and it got rid of my codes.

 

what do you mean spacers?? why would it need spacers? i think i connected my driver side to the rear O2 socket thats why its showing low voltage i just droped the car to my friend's work shop getting new plugs and wires ill see if it helps the roughness. anyone on the codes??

 

ttt anyone knows how to fix these codes? my mpg is down.