Throttle Body occasional limp mode - Fix - Saab 9-5 Bulletin Board - Saabnet.com
Site News -
9/23 Horn Button Rebuild 900/9000 |
9/21 Abandoned Saab Dealership
NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
[Main 95 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Throttle Body occasional limp mode - Fix
2 Saabers Like This Post!
Posted by Ro from Woodbridge [Email] (more from Ro from Woodbridge) on Thu, 25 Jun 2020 15:11:17
2008 Saab 9-5 SC AUTO 125K
Three weeks ago attempted TB Potentiometer (pot) cleaning as vehicle would randomly go into limp mode on a slight pavement incline at ambient temps above 70 deg F. ECU would throw two codes P1230 and P1231 could also notice before limp activation on freeway speeds that rpm's would randomly wander slightly back and forth as well as unstable hesitant idle on occasion especially when cold.
Googled the procedure, found some information what's involved and illustrations as to how to get to the carbon disks (pots) etc...
Removed TB, removed black plastic cover housing internals, disconnected and removed induction magnet / coil pack, removed nut holding permanent magnet and removed magnet itself.
Soaked two carbon disks ( pots) with a lot of electrical contact cleaner. With a slight longitudinal play in the TB shaft, was able to spray in between pots while tapping slightly with a rubber mallet on the TB shaft and rotating it back and forth to dislodge carbon build up. Repeated procedure a few more times and assembled everything back. While at it, cleaned carbon build up ( not much ) from TB underside butterfly and housing. Installed TB back in the vehicle.
Three weeks have passed with regular driving, vehicle drives and accelerates very smooth now, accelerates better/faster under heavy loads, engine idle speed is constant and smooth. Since cleaning, TB did not go into limp, and hopefully won't go into it for a while which would saves me from obtaining brand new TB.
I hope this information helps someone here for vehicle experiencing similar symptoms.
Cheers, Keep on SaaB'n
posted by 23.233.8...
Posts in this Thread:
Post a Followup
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
This is a moderated bulletin board - Posting is a privilege, not a right.
Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY.
Classifieds are to be listed in The Saab Network Classifieds pages.
This is a problem solving forum for over 250,000 Saab owners, so expect to see
problems discussed here even though our cars are generally very reliable. This is not an anything goes
type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the
Saabnet.com Mission and Purpose Page. Please remember that you are
not anonymous. Site Contact | Site Donations | Other Sites by SP -
Your address is: 188.8.131.52 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all
the Site Membership Benefits!