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2004 Cadillac XLR Question: my check engine light comes on my 04 XLR dealer codes are P0101, P0171, P0174

 

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DerrickXLR, Passaic, NJ, May 15, 2012, 00:27
 Rookie

I have a aftermarket top and bottom mesh grille and aftermarket exhaust system only from the catback. Caddy dealer fills the problem is due to the mesh grill not getting enough airflow i don't beleave that's the problem and i don't have the OEM grille or nor the OEM exhaust to prove them wrong the car is still covered under warr. I fill it due to vacuum leak. thanks Derrick

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    Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386
    globalhelper May 15, 2012, 06:32
     Master

    po101 is mass a/f issues and po171 and 174 are lean bank 1 and 2 which could be the mass a/f issue.what kind of a/f is in car and is it clean? can you remove grill and just leave it out to create more air flow? that would prove them wrong. you exh has little effect on these codes

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