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2009 Cadillac DTS P0411 Code

Tiny
TOMEXP
  • MEMBER
  • 2009 CADILLAC DEVILLE DTS
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 103,000 MILES
My check engine light is on code P0411, I had the car to 3 different mechanics had the vale replaced, had the pump replaced everything is working fine but the SAI coded out again. The local Chevy dealer says it is caused by a leaky exhaust manifold. I am already into this for $900.00 and the dealer wants $800.00 to replace the exhaust manifold on my 2009 DTS. Can you point me in the right direction?

Tom Murray
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Monday, June 1st, 2015 AT 6:44 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
This cold be an exhaust leak but everything I see is short to ground from solenoid or to solenoid as well as high resistance which could be a bad solenoid on air system. I'd take it to a local pro who is good in electrical to chase down all wiring issues prior to replacing manifold. Doesn't need to be a dealer. Stuff like that for us is hard to answer due to we can't see it nor check anything ourselves.
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Tuesday, June 2nd, 2015 AT 6:53 AM

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