Check Engine Light on

**Tom Gallagher** · 10-01-2008, 01:49 AM

Howdy Gents,

I have a 1992 Buick Regal Gran Sport (second car) with 170,000 miles on it.
The car as been running great the past 2 1/2 years. Just routine maintenance. I was coming home from work last week and the service engine soon light came on just as I was coming down the street. The next day the car started up fine and I just ran around town doing some errands. Making short trims everything is ok but on 3 different occasions after going 3.5 miles the light comes back on.

Does anyone have a clue as to what is causing this?

I would assume a sensor, but which one?

Any helpfull hints would be greatly appreciated!

**guyopel** · 10-01-2008, 01:04 PM

Tom What code is being set ? You can go to Auto Zone , Advance Auto Parts etc. and they will scan the code for free .. report back with the codes .. could be as simple as a vacuum leak etc. HTH
John

**spanky** · 10-01-2008, 06:02 PM

I doubt that auto zone or advanced will be able to scan it because obdII didnt come out till 94/95 but my guess is a cam sensor droping out

**bobc455** · 10-02-2008, 05:17 AM

You might want to check for some blown fuses. For example when the engine fan fuse blew on my car (also OBD I), it set a code that took a while to trace. Turned out to be just a blown fuse!

No guarantee, but easy enough.

-Bob C.

**diesel** · 10-06-2008, 11:08 AM

auto zone can do odb1 , and odb2 checks ...

**LRW67** · 10-12-2008, 01:25 PM

Could be a E.G.R. problem.
With 170K it is certainly a possibility.

**tiresmokindad** · 06-04-2010, 08:51 PM

Originally Posted by Tom Gallagher

Howdy Gents,

I have a 1992 Buick Regal Gran Sport (second car) with 170,000 miles on it.
The car as been running great the past 2 1/2 years. Just routine maintenance. I was coming home from work last week and the service engine soon light came on just as I was coming down the street. The next day the car started up fine and I just ran around town doing some errands. Making short trims everything is ok but on 3 different occasions after going 3.5 miles the light comes back on.

Does anyone have a clue as to what is causing this?

I would assume a sensor, but which one?

Any helpfull hints would be greatly appreciated!

There is a little bit problem with the battery. Try to check it the battery not the engine.

**WildKitty** · 06-05-2010, 01:21 PM

check the seal on the gas cap - try tightening it and see if problem goes away. if light stays lit, reset it by removing the negative battery cable for 15 seconds
Butch