Touareg: 2010 V6 TDI
Join Date: Mar 2013
Location: United States
Second Vehicle: is not a VW
Thanked 7 Times in 7 Posts
1) check your catalytic converter to see if it's clogged
2) check your O2 sensors. If the either sensor is weak, replace them both.
3) check your readiness codes with a VCDS. If any of the codes are no set, then you will not pass, but the test results should indicate if that's a problem.
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