Question about 1991 Buick Park Avenue

2 Answers

The check engine light stays on even after I was told the oxygen sensor needed to be replaced on my 1991 Buick Park Avenue, what else could be the problem?

I replaced the oxygen sensor but the light stays on what else could be the problem?

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Buick Master
  • 1,869 Answers

After repairs are made you must locate a small box in the middle of the speedometer cable under the dashboard and, press a button inside a tiny hole in that box with a small screwdriver this resets the light as, the light comes on only because so many miles have been driven

Posted on May 20, 2009

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 11 Answers

Have car code checked out at any parts store its free to have it done

Posted on May 20, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How many oxygen sensors are on a 1996 buick park avenue, and where are they located?

Everything you need to know

Aug 22, 2013 | 1996 Buick Park Avenue

1 Answer

Where is Oxygen sensor in my 1991 buick park avenue

you have 2 one in the exhaust manifold back of the engine and one in the front pipe behind the converter.

Jan 25, 2012 | 1993 Ford Ranger SuperCab

2 Answers

1991 Buick Park Avenue sputters at random, stalls-egr problem?

I would look at the Map Sensor or the O2 Sensor then the EGR Valve. As far as I know all vehicles have EGR valves. Get the Haynes Manual on your vehicle for location and replacement steps for all of these. It could also be a Throttle Position sensor or clogged or malfunctioning injector units, the Haynes manual will assist you in isolating these.

Jul 20, 2010 | 1991 Buick Park Avenue

1 Answer

Buick park avenue engine start problem

Try replacing the coolant control temp sensor, the one to the computer (usually it will have two wires), not the sensor to the temp light or gauge (usually has only one wire).

Apr 20, 2010 | 1991 Buick Park Avenue

2 Answers

Headlights and Park Lights Issue

there is no way to bypass it but the sensor is part of the headlamp assy i would check the relay to the p lights then go from there

Nov 27, 2008 | 1991 Buick Park Avenue

1 Answer


you need to check see wat codes are stored in computer . take it to autozone they check for free or you can clear the codes by removing the battery cable for 30 seconds

Oct 20, 2008 | 1991 Buick Park Avenue

1 Answer

Check engine light

Check all of the connections to the ECM--twice.

Be sure the four-letter code on your replacement ECM matches the one you removed.

The ECM relies on calibrations performed on some sensors while at the factory. For that reason there may be a switch or a sensor that is reading out of range.

If it seems to be running fine, drive it for a while and get an accurate measurement of MPG. Poor MPG will indicate that things like O2 sensor, MAP/MAF, TPS, IAC, IAT are not reading properly. Check for codes with a OBD-I reader.

Sep 04, 2008 | 1991 Buick Park Avenue

Not finding what you are looking for?
1991 Buick Park Avenue Logo

168 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

75807 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8172 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides