Question about 1995 Buick LeSabre
Code for trottle position sensor made check engine light come on. light stayed on all the time. Replaced trottle position sensor. Test showed sensor bad. Light went off for 500 or so miles. Check engine light now sometimes comes on[ cuts cruise off when does with cruise on]. The same trottle position sensor code shows up now, with new sensor. What do I do now? Do I replace the same sensor again? The car is a 1995 Buick LeSabre Limited. Also on same car I have problems with transmission shifting into overdrive, even after replacing filter and fluid in pan. Also added Lucus transmission fix with Castrol transmission fluid to refill transmission. I had no proplem shifting for a while after change. Problem shifting happens now just every once in a while.Is transmission flush and new filter needed now or what? I have around 8,000 miles on transmission fluid/filter change now.
Your transmission problem could be related to the TPS sensor. The TPS sensor indicated to the PCM when and what gear the transmission should be in. As for the Lucas and other additives to the transmission may be doing it more harm then good, As the transmission oil is thicker, the transmission line pressure increases. The PCM try's to compensate for that by letting the converter lock up clutch to slip and the fluid retention in the solenoid to change gears stick causing it to shudder between gear shifts. Recap, Check the TPS sensor readings and the Wire Harness. Look for loose connections and corrosion that may not be giving the proper readings to the ECM. Rescan the car for any DTC codes and most transmission chop can do that for you if your going to get it serviced there anyways. Have the transmission fluid flushed and filter changed, and have them do a transmission line pressure checked, there are additives out there to keep the fluid from foaming which is ok, but changing the fluid's weigh can cause transmission failure. Good luck and hope this helps and keep me posted, be glad to help.
Posted on Jun 14, 2009
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jul 10, 2013 | Cars & Trucks
Dec 30, 2012 | 2005 Mercury Sable GS
Sep 14, 2011 | 1997 Ford F350 Crew Cab
Feb 09, 2011 | 1999 Chevrolet K1500
Aug 26, 2010 | 1981 Chevrolet Corvette
Mar 12, 2010 | 2001 Toyota Sienna
Sep 12, 2009 | 2003 Kia Rio
Apr 29, 2009 | 2001 Kia Optima
Nov 23, 2008 | 1997 Buick LeSabre
360 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: