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.
Last edited by John Mac; 12-15-2010 at 07:45 PM.
Reason: New info from forum