help please!. code P0135 and P0155 O2 sensors

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Aug 20, 2014 | 10:28 PM

ikaros23

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From: coral springs FL

help please!. code P0135 and P0155 O2 sensors

I know these codes are related to O2 sensors. I did long tube headers many years ago but the car has been sitting in the garage since then with the occasional drive around the neighborhood once a week,.Today I took the car for a 15 mile trip and on my way back the car started to drive like a **** and it was trowing these 2 codes. I havent done a tune yet and the car seems to be running rich. maybe I **** the 02 sensors while driving. Could this be the cause? I also check for burn wires and all that but everything seems to be okay.

Aug 20, 2014 | 10:58 PM

JC316

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A tune wouldn't affect those sensors since they're the upstream sensors. They have likely just died from age. Swap them out with new ones and you should be good.

Aug 21, 2014 | 08:19 AM

Huntr1117

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From: Richmond, Tx

My car occasionally throws the same 2 codes. O2s slow to respond. I replaced mine with new Ac delcos and it still throws the codes. My tuner said that it happens to some cars with LTs because the O2s take too long to heat up. Exhaust leaks can also cause it.