p0412 Hewitt Bypass

Hey all, our fams 2010 4.6L w/ 105k miles threw a P0412 code. VSC and blinking 4 Lo light up the dash. Driver's side air system switching valve is the suspect which must have been replaced already as it's the Dorman not Denso. I'm in AZ so have to pass emissions every 2 years.

I'm considering the Hewitt bypass kit, and wanted to ask if any of you who have done that how many miles you have on them, and have had any ongoing CEL's or performance issues. Thanks in advance.

 

I have the Hewitt Bypass kit on my 07 5.7L and it works quite well. I learned the hard way that it is very important to install the block off plates! Anyway, they are a great company and a good product.