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Codes P0171 & P0174

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Old 12-15-2010, 07:20 PM
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Angry Codes P0171 & P0174

Hi Guys my 2004 X type 2.5 just thru these codes .I had new plugs fitted 2 weeks ago at a cost of $425.00 Ouch. Did not want to tackle that job myself.
Vehicle is running fine just annoying that the check engine light is on.
Local Auto Zone pulled the codes and said is was the Bank 1 upstream CO2 sensor and the Bank 2 Downstream CO2 sensor. Running Lean
Checked on the forum and found it could be a Dirty MAF sensor causing the codes to appear. Were is the MAF sensor and any tips on how to clean it.

Thanks
John

Last edited by John Mac; 12-15-2010 at 07:45 PM. Reason: New info from forum
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Old 12-15-2010, 08:33 PM
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lots of discussion about vacuum leaks at this time of year, every year. do a quick search on those lean codes and you'll see discussions around three likely culprits that are easy to check and fix.
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