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emissions error code help

Old Mar 22, 2013 | 09:40 AM
  #1  
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Abirli
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From: hershey PA
Default emissions error code help

Hey CF,

in PA we have to have a safety and emissions test for inspection.
i passed the safety part but failed emissions with error codes P0121, P0158, P2272, P2273.

To fill you in i have the ls3 with z06 manifolds, Borla 3" x-pipe, and B&B 3" bullets. i also have the halltech mf103, and a ported TB.

for the o2 sensors, we de-loomed the factory ls3 sensors to stretch them to fit the z06 bungs.

the Tech said that it was unusual that the lean and rich codes would come up at the same time.

do you guys think i need a tune to clear it all up or new z06 o2 sensors or what?

thank you for any help
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Old Mar 22, 2013 | 12:26 PM
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From: Oshawa, Ontario
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Originally Posted by Abirli
Hey CF,

in PA we have to have a safety and emissions test for inspection.
i passed the safety part but failed emissions with error codes P0121, P0158, P2272, P2273.

To fill you in i have the ls3 with z06 manifolds, Borla 3" x-pipe, and B&B 3" bullets. i also have the halltech mf103, and a ported TB.

for the o2 sensors, we de-loomed the factory ls3 sensors to stretch them to fit the z06 bungs.

the Tech said that it was unusual that the lean and rich codes would come up at the same time.

do you guys think i need a tune to clear it all up or new z06 o2 sensors or what?

thank you for any help
po121 is indicating a problem with your TPS sensors in your TB and you say you have a ported TB.you may want to check that. try a stock TB for a start.po158 is indicating a problem with 02 sensor bank 2 sensor 2

Last edited by irok; Mar 22, 2013 at 12:35 PM.
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Old Mar 23, 2013 | 07:47 AM
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From: Sugarhill Ga
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check for burnt harness to the rear sensors. could you have dropped or banged the sensor during install or removal ?

po# 121 is the thottle, check to see if the blade is moving smoothly.
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