I have 01 buik century that my speedometer is not workin right and when my speedometer goes down my car shiftsdown i replaced speed sensor but didnt help what can i do

Alejandro-Perla Najera

Asked by Oct 12, 2013 at 06:28 PM about the 2001 Buick Century

Question type: General

1 Answer


The speedometer malfunction and downshifting could be related to the speed sensor. Thus a question, did the replacement of the speed sensor fix the downshift issue? If so, the speedometer has what are called "servos", which are small motors receiving signals from the PCM via various sensors (such as the speed sensor), and use them to drive the needles in the various components in the speedometer cluster. These go bad after time, and will require a rebuild of the cluster by an expert. Odometer fade (resistor failure) is another common issue in the cluster as well. If the speed sensor didn't fix either item, a pronounced downshift could be a symptom of several things, but the failure of the pressure control solenoid in the transmission may be the issue, and could have a pronounced affect on the speedometer read as well. Hopefully this is not your issue as this repair is not easy (removal of the front driver's side wheel assembly and part of the transmission), and quite expensive. Good luck.

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Buick Century Questions

Buick Century Experts

#1 John Saffrahn
John Saffrahn
Reputation 840
#2 Tom Demyan
Tom Demyan
Reputation 640
#3 LtColumbo
Reputation 300
View All

Related Models For Sale

Used Buick LeSabre"
16 Great Deals out of 2,600 listings starting at $1,450
Used Buick Regal"
190 Great Deals out of 10,616 listings starting at $5,900
Used Chevrolet Impala"
937 Great Deals out of 35,886 listings starting at $700
Used Ford Taurus"
348 Great Deals out of 23,127 listings starting at $1,400
Used Chevrolet Malibu"
1,182 Great Deals out of 72,976 listings starting at $695
Used Toyota Camry"
1,651 Great Deals out of 98,959 listings starting at $895
Used Honda Accord"
1,309 Great Deals out of 78,750 listings starting at $1,395
Used Pontiac Grand Prix"
27 Great Deals out of 4,393 listings starting at $1,972
Used Nissan Altima"
1,491 Great Deals out of 88,087 listings starting at $1,195
Used Nissan Maxima"
475 Great Deals out of 24,246 listings starting at $800
Used Mercury Grand Marquis"
50 Great Deals out of 2,571 listings starting at $1,300
Used Ford Focus"
1,215 Great Deals out of 57,389 listings starting at $1,495

Used Cars For Sale

2004 Buick Century For Sale
112 listings starting at $3,295