Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X3 (F25) Forum
Fluid Motor Union
User Name
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management

LinkBack Thread Tools Display Modes
Old 01-08-2020, 08:54 PM
Join Date: Nov 2017
Location: NC
Posts: 11
X5Nafta is on a distinguished road
1D2008 code - map thermostat jammed open

14 XDrive3.5i with 93k miles on it. Got check engine light and showing 1D2008 code in ISTA.

Code appears to be pointing to Auto Tranny cooler Thermostat stuck open, but based on some reading it could also be coolant thermostat (BTW WP and thermostat are original).

Anyone had experience with this code?

Thanks in Advance!
Reply With Quote

Sponsored Links

Old 01-10-2020, 02:16 PM
Join Date: Nov 2017
Location: NC
Posts: 11
X5Nafta is on a distinguished road
Found TSB on line related to my DME error:

Fault Code 1D2008: Map thermostat: jammed open is stored in the DME. There may also be a complaint of low heat output with lower outside temperatures.


According to tsb, by process of elimination, I had to find out if it was my engine coolant thermostat or ATF trans thermostat (they are in the same loop). Followed their procedure, and ended up being my engine thermostat.

* On 40-50 F deg days, my coolant temp was between 30-45 deg C.
* Radiator Fan was running at full blast.
* Otherwise, car drove normal.

I will be replacing WaterPump and Thermostat, since they are original and 93k miles old.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 11:02 PM.
vBulletin, Copyright 2021, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.