Hi Scotty,
my 06 sequoia is throwing a code for the secondary air injection valves. To replace them you must remove the intake manifold. May not hurt to also replace the pump / fan as well since I'm in there. Very expensive at the local shop, but it looks like a DIY. Lots to remove and put back in the right place couple tight spots to work in, but otherwise nothing unusual.
Hewitt sells a bypass kit. https://hewitt-tech.com/product/secondary-air-injection-system-bypass-kit-gen-1-v36h/
Thoughts on this project as a DIY replacing the system proper and thoughts on the short cut from Hewitt?
I'm in Massachusetts and I'm concerned it won't pass inspection.. .but... the system is designed to heat the cat during cold start and otherwise serves no other function as I can tell. Back in the day, whenever that was, we would never bring a cold car in for inspection. So wondering if it would pass as long as I warmed up the car first to heat the cat naturally with the exhaust. But also wondering, since they do hook up the car direct to the inspection computer, if the inspection computer would detect the bypass even if the actual emissions measured at the tail pipe were in spec. (do they even take an exhaust sample any more?)
the bypass kit is about $150 bucks but if it fails inspection next year (I just got it inspected to I have a year before the next one) I wasted $150 for something that I must remove anyhow and if so, I would be better off putting that $150 towards the replacement parts.
Thanks.
Bob M.
You have an 06. That's sixteen years old. I would replace it rather than modify the engine in hopes of the code going away. You won't have to worry about it for another 16 years. At that time the car will be 32 years old. DIY is always going to be cheaper than going to a mechanic. My problem is if I do the work on a weekend and I need a part or break something then I a stuck. I need my car to get to work. Sometimes it pays to bite the bullet and pay someone with all the tools and expertise. Especially if it's only once in 16 years.
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I would fix it correctly. You do not want to gamble on that. Another thing is that since they have to remove the intake manifold to do the job, replaced the spark plugs as well so you do not have to do it again. Also, make sure they repalce the intake manifold gaskelt.
