P0420 pops up after Header kit install - Power Hungry Performance Forum

		Power Hungry Performance Forum > Ford F-150, Expedition, Navigator, Blackwood, Mark-LT, SVT Lightning and H-D Editions (Disabled) > 2009 to 2014 F-150
P0420 pops up after Header kit install

2009 to 2014 F-150
3.5L, 3.7L, 4.6L, 5.0L, 5.4L, and 6.2L equipped F-150s.

#11

Sun, October 3rd, 2010, 03:46 PM

jmt0645

semper fi

Join Date: Dec 2009

Location: mobile ,Al

Posts: 45

the noise is part of having headers. mine are the same way. i've forgotten about mine making noise till this thread

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