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Engine codes help.

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Old Sep 15, 2010 | 02:30 AM
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Default Engine codes help.
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..
Last edited by omarrakeen; Sep 15, 2010 at 02:48 AM.
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Old Sep 15, 2010 | 03:50 AM
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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.
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Old Sep 15, 2010 | 04:35 AM
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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??
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Old Sep 15, 2010 | 03:50 PM
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ttt anyone knows how to fix these codes? my mpg is down.
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