420 code...again

[BlackWorksInc]

Has anyone received a P0430 /420 code after performing the HCF (hydrocarbon filter) delete?

This shouldn't cause that code unless the MAF sensor is contaminated.

I would recommend people look at their fuel trims if they have the option to do so when diagnosing the catalytic converter codes. It can be a bit confusing, but it does help a ton when trying to determine the culprit.

I can't remember if I explained fuel trims in my Toolbox thread, I'll have to check and maybe add a section for that.

 

[CXS]

Has anyone received a P0430 /420 code after performing the HCF (hydrocarbon filter) delete?

Answering for everyone - No

 

[eddiebx]

Maybe your truck is trying to send you another message here.

 

[CXS]

:laugh: I think that would be the MJ420.