2007 Burb LTZ 5.3l Flex
July 13th, 2014, 3:25 PM
#11
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Which sensor? The 02? To pass emissions two years ago I had to replace two exhaust sensors, and I purchased aftermarket Bosh. Could they already be bad?
July 13th, 2014, 3:54 PM
#12
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Here are some readings from mine I took a while back an 07 with 5.3 flex
O2S11($00) 0.745
O2S12($00) 0.745
O2S21($00) 0.170
O2S22($00) 0.740
ALCOHOL($00) 3.1
O2S11($00) 0.745
O2S12($00) 0.745
O2S21($00) 0.170
O2S22($00) 0.740
ALCOHOL($00) 3.1
July 13th, 2014, 4:28 PM
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July 15th, 2014, 9:19 AM
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Perhaps someone with a bit more knowledge than myself could let me know if the upstream 02 sensors are what is causing my ECM to register rich fuel trim?
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