| I just went through that hassle. Save the time and just pay to have it done. My Nox was lower then yours - I tried all the tricks. After re-installing my CATS for the test and failing I Increased fuel pressure with my adjustable FPR Added fuel with my AFC Knocked about 10 - 12 degrees of timing out. Made sure not to run the car too hot before the test And ... My second reading was no better. As stated above save your time and look to have it done.
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