PCV refresh/replacement

[timc930]

So what was the final solution to to Lean idle P2187/89 codes? Carol started getting them this week.

 

[jlglr4]

This PCV refresh is a good place to start if you haven’t already done it. It is probably the most common cause for the lean code at idle that I’ve seen on these forums. It’ll need to be done at some point anyway, so even if that’s not your problem, it’s not a waste of time.

You can probably narrow it down to a vacuum leak if you have a gap tool (or other tool) that can look at fuel trims - lean fuel trims trending down to normal with increasing RPMs.

Couple of other common vacuum leaks I’ve read about have been breather hoses popping loose - especially the drivers side where it connects to the air intake plenum - that happened to me; bad purge valve; valve cover leak (you‘d be seeing an oil leak too I suspect); and other evap components (though I’d expect EVAP leak codes as well). The V8 had issues with the vacuum pump, but I haven’t heard of those on the V6 so much.

 

[timc930]

Thanks. She has a 2015 SCV6.

 

[chap3]

Thanks for the write up. Was struggling to get that rear clip out to make room to fit the new diaphragm in

 

[fontanna]

You might wanna ad that as a preventive maintenance 100k or 10 years, the plastic and the rubber looks like paper.