04 A8L Help Code 17981 & 17985

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Oct 13, 2011 | 01:22 PM

AUDIALL

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04 A8L Help Code 17981 & 17985

Hello, I have 04 A8 with the following fault
17981 & 179855

17981 - Left Engine Mount Solenoid Valve (N144): Open Circuit
P1573 - 004 - No Signal/Communication
17985 - Right Engine Mount Solenoid Valve (N145): Open Circuit
P1577 - 004 - No Signal/Communication

Any input/Help what causing these to pop up?

Oct 13, 2011 | 05:06 PM

mikesd1980

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From: New Jersey

I am thinking that both(left and right) engine mounts is bad.

Oct 13, 2011 | 05:53 PM

tashakes

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From: San Diego, CA

Doubt it. Check all fuses/relays. Strange for both go at the same time.

Oct 13, 2011 | 06:47 PM

jakematic

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From: NC USA

Quote:

Originally Posted by tashakes

Doubt it. Check all fuses/relays. Strange for both go at the same time.

Agreed, additionally clean the contacts.

EDIT: I've personally seen redundant systems fail at the same time (not on Audi yet, and not on a car) though so don't discount that.

Last edited by jakematic; Oct 13, 2011 at 07:41 PM.

Oct 14, 2011 | 07:17 AM

AUDIALL

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Isn't this is odd that both mount goes bad at the same time?
Any one knows how much it cost to change it, i have to take it to dealer to get estimate.

Dec 28, 2018 | 06:13 AM

tt1234

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From: Chicago, IL

Hi I have the same issue on my A8 2008
could anyone guide me to find where the fuse box and which one to check may be a diagram would help please.

Dec 28, 2018 | 08:49 AM

MP4.2+6.0

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From: SF Bay Area, CA

Quote:

Originally Posted by tt1234

Hi I have the same issue on my A8 2008
could anyone guide me to find where the fuse box and which one to check may be a diagram would help please.

Same answer as other thread...on same topic. Manual would also have electrical diagrams, fuse locations (multiple), etc. Should do physical check regardless. May have blown torque mount too, which most likely will not have codes. If unfamiliar w/ that...Google, or shop manual. Torque mount posted (including pics) a few times in past year.