SOURCE: 2001 buick regal ls - mileage dash lights are out
It is your Instrument cluster, see my answers to this question and write me if you have any more questions, it cost me a total of no more than $15 dollars to fix it myself, took be about one hour.
SOURCE: 2001 buick regal w/ bad ignition coil and clogged catylitic conv.
Hello! The defective ignition coil more than likely contaminated the downstream O2 sensor...If there isn't a trouble code and engine performs in a normal fashion, there's no reason to change the upstream sensor...
Guru........Saailer
I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867
SOURCE: 2001 Buick Regal GS How to turn off " Low
check sensor on reservoir. Unplug connector to sensor to see if light goes out. If yes, replace sensor. If no, wire may be shorted.
SOURCE: picture of low side ac port on 2001 buick regal
You low pressure port is against the firewall just below the center of the cowl and is best accessed from the drivers side
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