p0410/1411, no CEL

[flyingpenguin]

Have been getting a CEL for P0410 / 1411 (Secondary Air Injection) and ordered a new air change over valve and electric change over valve, as previous diagnosis confirmed no other issues with the vacuum lines.

Imagine my surprise when I drove off this am, and the CEL did not light up. CEL lamp is functional, so just to make sure I hooked up the Durametric, hoping to see the P codes had disappeared.

That not being the case, I am wondering why engine management no longer shows the CEL while the codes persist in memory.

Any comments are welcome.

Joost

[Loren]

Did you clear the codes and they came back?

If not, then codes remain pending until enough drive cycles have occurred without a fault to clear them.

[flyingpenguin]

Did you clear the codes and they came back?

If not, then codes remain pending until enough drive cycles have occurred without a fault to clear them.

Thanks Loren!

I did not clear any codes, the CEL disappeared, but the codes remained in memory.

Cleared the codes and will go thru the drive cycle and see if they come back. If I am lucky the SAI problem resolved itself.

Will revert, and ma have some parts for sale. ;-)

Joost

[flyingpenguin]

Quick update:

Have used parts for anyone interested. We bench tested them (both the air change over valve and the electric change over valve) after replacing with the new parts, but to be honest, I think the problem got solved by replacing most vacuum lines with a slightly thicker version than what was on there originally. This must have stopped the minute vacuum leaks and all is well.

Passed inspection this am!

JP