91 Buick Riviera. transmission slipped, check engine light went on and speedometer quit working.


Asked by Oct 07, 2013 at 11:58 PM about the 1991 Buick Riviera

Question type: Maintenance & Repair

The tranny slipped, check engine light went on, and speedometer quit working.  Car will shift if I start in low gear and manually shift it.

4 Answers


Try this: Roll down a window, disconnect the battery negative cable, turn on the headlight switch, wait at least 30 seconds, turn off headlight switch, reconnect battery and roadtest to see if systems came back. If they did great, if not then you will have to have the transmission and ECM checked. You may have a transmission problem just starting, get the slipping checked before it leaves you walking.

Jason Zane

transmission clutch pack is worn. vehicle speed sensor (vss) should be replaced. seems about right for the car's age.

1 out of 1 people think this is helpful.

I would have to agree with Jason. The input speed sensor needs replacing. This malfunction will cause a number of warning lights to illuminate. Another cause could be the transmission shift solenoids have worn, causing the transmission to go in limp mode . Do not add more transmission fluid, this is a common mistake people make when transmission problems occur.

1 out of 1 people think this is helpful.

Whereas I had to replace transmissions in two of my Rivieras... a third one with the problems of slippery,CEL and speed odometer needle moving all over the place was solved by changing the ECM. I agree with Tennisshoes have them checked>>>SEMPER FI Good luck.

Your Answer

Add photo

Related Questions


Looking for a Used Riviera in your area?

CarGurus has 151 nationwide Riviera listings starting at $1,295.


Search Buick Riviera Questions

Buick Riviera Experts

#1 Alvin1966
Reputation 970
#2 Chris Kelley
Chris Kelley
Reputation 520
#3 Jason Zane
Jason Zane
Reputation 380
View All

Related Models For Sale

Used Cadillac Eldorado"
444 listings starting at $2,950
Used Buick Regal"
184 Great Deals out of 10,514 listings starting at $1,995
Used Cadillac DeVille"
2,392 listings starting at $1,600
Used Buick Skylark"
118 listings
Used Chevrolet Corvette"
435 Great Deals out of 20,181 listings starting at $3,688
Used Lincoln Continental"
1,860 listings starting at $42,501
Used Ford Mustang"
749 Great Deals out of 41,215 listings starting at $900
Used Chevrolet Camaro"
828 Great Deals out of 39,037 listings starting at $2,650
Used Buick LeSabre"
22 Great Deals out of 2,618 listings starting at $1,450

Used Cars For Sale

1997 Buick Riviera For Sale
17 listings starting at $1,295