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My 02 Cadillac Deville has a code P0412. What needs checked

Tiny
DISCOUNTMOBILEMECHANIC
  • MEMBER
  • 2002 CADILLAC DEVILLE
  • 120,000 MILES
Car runs great but dealer says its throwing a P0412, what do I need to check and/or replace to correct the issue? My security llight is also staying on, can this be related?
Wednesday, November 16th, 2011 AT 1:42 AM

3 Replies

Tiny
PROAUTOTECH
  • MECHANIC
  • 288 POSTS
Air ride suspension code- Borrowed from another site, I dont plagerize- The P0412 code means that the relay for Bank 1 isn't connected or the relay is bad. This is an electrical problem. I would attack this as the highest priority because if the relay isn't working the PCM will probably throw the P0410 code too. A non-functioning relay is probably what happened to allow the pump itself to fill up with condensation. You might also check the intake hose to the AIR to make sure that it isn't off or broken. It's possible that if the relay, its wiring, and its connector are all OK and the pump is dried out that everything will be OK
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Wednesday, November 16th, 2011 AT 1:55 AM
Tiny
DISCOUNTMOBILEMECHANIC
  • MEMBER
  • 2 POSTS
Where is this relay located on the car?
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Wednesday, November 16th, 2011 AT 1:59 AM
Tiny
PROAUTOTECH
  • MECHANIC
  • 288 POSTS
Try upgrading the question to get a good response.
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Wednesday, November 16th, 2011 AT 2:06 AM

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