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Saw these codes the other day. Anyone know what they are?

Also, I'm getting 420/430 codes (inefficient cats) despite the fact that my tuner disabled my rear Ox sensors. So, obviously the front sensors are throwing them - how could that happen?
 

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WhosUrDaddy said:
Saw these codes the other day. Anyone know what they are?

Also, I'm getting 420/430 codes (inefficient cats) despite the fact that my tuner disabled my rear Ox sensors. So, obviously the front sensors are throwing them - how could that happen?
P0172 Fuel Trim System Rich bank 1-B

P0175 Fuel Trim System Rich bank 2-B

I'm no Vette expert, but it may sound like you need a tune......
 
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