Question about 2000 Buick LeSabre

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2000 buick lesabre had check engine light come on right before smog had to be done so I had a mechanic put a computer code reader on it (I dont recall the exact code) I was told that the mass air flow sensor was dirty & we purchased a spray (Mass air flow sensor cleaning spray)that is specificately for cleaning mass air flow sensors took it out cleanned some minor residue the light went off immediately so I took the car in to be smogged (thinking Everything is fine) & was told it failed due to computer wasnt working that computer must be fried & i need to replace. the computer has since told me my tire pressure needed to be checked which was correct since there was a screw in a tire which has now been repaired &since I'm getting the same code saying sensor is dirty the check engine light hasnt come back on & the dmv says today is last day i can smog even after i paid the 2000 registrtion fee (so high due to being late because of this issue) I dont know what to do or think is the computer fried??

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: failed smog

looks like you need to replace the co2 sensor

Posted on Aug 19, 2008

  • 135 Answers

SOURCE: Need Mass Air Flow Sensor for my 1997 Buick LeSabre Custom

not unless you take it to autozone and have them put the scanner on it and clear the code which caused the light to come on. also they can tell you what the original issue was.

unfortunately it sounds like you just started to replace parts and honestly you could have already repaired the issue

Posted on May 04, 2009

  • 389 Answers

SOURCE: just changed the battery and tried to smog the car

I can tell you what a girl did to reset her security system but please understand it is just a guess and give me a thumbs up for trying, Or at least not a thumbs down. I am struggling to keep up my good name on here. LOL
All she had to do was turn the key on for 10 or 15 minutes and thelight went out for her. Not starting it but just turning the key on. Now my idea if that doesn't work is to reboot the whole computer system. You do that by taking the negative battery cable of and then turning the headlights on and the heater and radio. Beware that if you have a radio that requires a code to operate then you may loose this code programed into it and you may have to re-enter it.
SDo if you still want to continue then with the items on and then the key turnned to the on position wait 30 minutes for any stored up power to drain and the turn everything back off including the headlights and key and re-connect the battery cable. This should set the computer back to factory defaults. Ihope this helps and remember this is just trying to help and no guarantee, Raz

Posted on Apr 20, 2010

  • 177 Answers

SOURCE: 1999 chevy tahoe. check engine

The vehicle need to be timed.If you had a intake done this should have been done at that time.you will need a scan tool to time this vehicle as there is no timing marks and the computer uses the cam sensor in the Distributor to time the vehicle.IT is locaqted in the scan tool under cam ******.you must rev the vehicle once for the computer to detect a timing change.every time you adjust the distributor you must rev the vehicle once.(you only need to get to 1500 rpm for this to occur).

Posted on Dec 02, 2010

JLMacMan
  • 70 Answers

SOURCE: the check engine light comes on and it dies on

Check engine lights are mostly caused by fuel / air delivery and emissions problems. A lot of electrical parts play a big role in this "check engine" light. Instead of cleaning the mass airflow sensor, try replacing it. Also try not to pump gas at gas station that have E10 mixtures. That could trip O2 sensors to read incorrectly and cause the engine light to come on ( a bad O2 sensor can cause that also). If you don't follow the proper maintenance schedule for you car expect to have some lights go off. I would highly recommend to replace the mass airflow sensor. You also might need to reset your car's computer by disconnecting the battery for about 10-15 minutes for it to reconfigure. If the issue still occurs try replacing the O2 sensors. If all else fails have it repaired at a mechanic shop.

Posted on Mar 05, 2011

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1 Answer

Why wont my 2000 buick lesabre start when the security light comes on?


The light is on to indicate you have been locked out and the engine disabled. You must now have the dealer scan the system and determine the cause of the malfunction in the security system, it is likely the ignition lock cylinder key code reader that is defective.

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The first step is to find out why the check engine light is on. this may solve your problem. you can go to an auto parts store that will scan the computer free or charge, they will give you a print out with the codes. write me back with the info 2000 buick LeSabre and engine size and i will help you solve the problem. good day.

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A factory fuel cap would be a good start. The other possibility is that the vent solenoid is stuck open. Ou can buy an inexpensive code reader for about $50 that will both read and clear codes. If the new dealer gas cap took car of the problem than the light will stay off after you clear it. If it was to the problem than the light will come back on. The EVAP system can be checked with a smoker. Any good shop that deals with these problems will have one. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

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Getting codes from a 2000 buick lesabre


Buy yourself a OBD-II code reader, V-Checker (online) or one from Harbor Freight Tools. $50-ish range. This will let you read the stored codes and even reset the check engine light, useful when the problem has been solved. In general the Check Engine Light doesn't reset itself. The computer knows something is operating out of specifications, sets a fault code within the computer's memory and illuminates the Check Engine Light to let you know something "flipped" when it should have "flopped". (That last part if just an electronics technician's joke derived from a chip called a flip-flop, used here with jocularity to indicate a malfunction.)

Jan 15, 2012 | 2000 Buick LeSabre

2 Answers

My car was diagnoised with a bad air flow sensor


the mass air flow sensor is located under the top plastic engine cover. to remove this un screw the oil filler tube by hand and remove the top cover. its just to the right of center engine. unplug this sensor. next it has two screws to take this off. It is not standard screws so look at it. remove them and replace sensor. After install go to autozone and have the warning code removed. This is done free. 2000 buick lesabre

Sep 18, 2009 | 2000 Buick LeSabre

1 Answer

1994 Buick Lesabre service engine soon light. Can't read code.


I found several shops in my area, Albany, NY that had the older code readers. It worked fine, and cost me $30.00. It showed a bad O2 sensor that I replaced myself. I suggest you go to a reliable shop. Auto Zone/Advance etc.. do not have the right code readers. Joe

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2 Answers

1997 buick lesabre, engine light stays on


The are many things that can cause your "check engine" light to stay on. One possibility is that although you have fixed the trouble code for your crankshaft position sensor, the code has not been erased from the computer's memory. Another possibility is that you have another issue going on that is causing a new trouble code to come up. You're going to need to have your car hooked up to a ODB-2 engine code reader to see what the issue is. These code readers are available for purchase at any auto parts store. In addition, many of your local auto parts stores will check trouble codes as a free service to customer. If not, many parts retailers offer the option to rent one of these code readers. Which ever way you decide to go, run a full engine/emissions trouble code check. If the only code that comes up is the code that came up previous to fixing your positioning sensor, then all you need to do is erase the trouble code from the computer's memory. (Most code readers have the option to erase trouble codes, but if you're going to rent or buy one, I would suggest that you check to make sure that the code reader that you're getting is capable of erasing trouble codes as some code readers only indicate the codes and will not remove them from your computer's memory.) If your trouble code scan reveals other codes, then you'll have to fix and erase them as they arise.

FYI- In my experience, I've noticed that 95% of the time that a check engine light/trouble code arises that it is usually an emissions problem (oxygen sensors, mass air-flow units, MAP sensors, etc.). However, General Motors products are notorious for getting trouble codes for having loose battery/ground connections and for having worn-out fuel caps. With any GM vehicle, I always check these two things first to try to save me from having to look further than I need to.

Hope this helps! I'm sure once you've scanned your cars computer and erased any existing trouble codes, that you'll stop being annoyed by your check engine light, as I know how bothersome it can be. Have a great day!

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2 Answers

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try change the fuel filter.
and sure there is no abstraction in the air flow from the air filer to the air mixture intake.

Oct 15, 2008 | 1995 Buick LeSabre

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