Question about 2001 Buick Regal

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2001 Buick Regal ls. p0171 code. Just replaced spark plugs, MAF sensor, and upstream 02 sensor. Car sputters at times going up hill typically when the engine has warmed up. The code still remains? Wha

Car has 125,000 miles on it.

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P0171 OBD II Trouble Code This site may help locate the problem. Unfortunately these trouble codes do not necessarily pin-point a problem. They merely direct you to the general location of a problem i.e. a faulty system or circuit. So I advise you go down the list of possible causes, and check the PCV valve, and vacuum lines, etc. I hope this helps! Good Luck....

Posted on Mar 28, 2014

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Posted on Jan 02, 2017

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SOURCE: Car starts then stalls out...

could be to many thing to take chances with, but most commonly;fuel filter,gas line antifreeze or a crack in your air intake which would take your vacuum seal away, start with the least expensive and work from their. Worst case scenario pinched fuel line

Posted on Jan 19, 2009

  • 2 Answers

SOURCE: fans run constantly

Irwinr12 is right, no amount of fan will keep the Regal from warming up if the thermostat is working properly, Replace it. Clear SES light with OBDII tool & you should be good to go. BTY its the car computer that keeps the fans running, and they will continue to run until you clear the code. Any kind of cooling/overheating proiblem will kick in the SES light and set both fans running. I own '01 GS, my son has '03 GS and we have both complete set of service manuals. Trust me, do what I say. Batman

Posted on Mar 11, 2009

GM Elec
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SOURCE: My 2003 Buick Regal is running like ****

Per your description, it sounds as though you have a stuck injector. I assume you have a service engine light on. Take the vehicle to your local Auto Zone or Advance Auto Parts and ask them to scan the car for trouble codes, they will scan the vehicle at no charge to you.
Write the codes down and respond back to this post and we can get started.
Let me know.
Regards,

Posted on Sep 09, 2009

  • 599 Answers

SOURCE: 1984 buick regal "service engine soon"

you need to find someone with an old type scan tool,or one that has an adapter for the older cars to read the codes. you can also do this by jumping 2 wires on tha obd connector and count the flashes. the first suggestion is the best. get the code and get back to me and we'll go from there. hope this helps Thanks Ray

Posted on Feb 18, 2010

  • 100 Answers

SOURCE: 1998 Regal LS sputters/stalls; alternator keeps failing

i'd say you have a ground problem if you are burning up alternators... sorry if that don't help... i would have to see car to better appreciate problem.

Posted on Mar 22, 2010

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2 Answers

2001 Buick la sabre Code p0171 and p0102 I have replaced every thing but the Maf and erg


did you clear all codes after fitting everything the read for codes again

try cleaning the plug in contacts of the maf
and cleaning the maf itself
Mass Air Flow (MAF) Circuit Low Input
https://www.obd-codes.com/p0102

A code P0102 may mean that one or more of the following has
happened:
The MAF may be disconnected, or a wiring connection may be bad The MAF may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF). The MAF sensor may be faulty The vehicle computer may be faulty (very rare)

if you replaced.02 sensor.it should not throw a pO171code
https://www.obd-codes.com/p0171


egr valve ...can be tested ...even cleaned

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26319091-1xghuso0dtf1wvqnhgyxjoi3-1-1.jpg

Oct 20, 2016 | Cars & Trucks

1 Answer

I changed Buick Regal LS 2001 vin K. . MIL light ON. DTC P0102 , with new MAF DTC P0171


make sure the air cleaner area is clean no debris the do the set up procedure

Aug 27, 2012 | 2001 Buick Regal

1 Answer

Im throwing code p0171 bank 1 system too lean changed plugs fuel filter cleaned maf sensor swapped bank1 and bank 2 upstream 02 sensor to c if code red diff but it didnt and sprayed carb cleaner all over...


Your problem is the mass air flow sensor is bad theat code is miss leading a p0171 and p0174 are both miss leading replace the mass air flow sensor and clear the codes.

May 10, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

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

Aug 03, 2010 | 2001 Buick Regal

1 Answer

I keep getting a p0171 and p0175 codes from the scanner (auto x-ray)(meaning i'm lean in bank 1 and too rich in bank 2). fuel injector cleaner didn't help really help. so should i replace the upstream O2...


p0171, p0175 = system too lean (usually related to MAF Sensor) this means that the Air Flow Sensor is telling the computer that much less air is entering the engine than actually is. but first check for vacuum leaks in hoses and also pcv hose. the maf sensor may just need cleaned. any auto parts store will have maf sensor spray, follow directions on can. or you can use electrical spray also. as for the 02 sensors its possible. check or clean maf sensor first.

Jul 29, 2010 | Chrysler Concorde Cars & Trucks

1 Answer

2002 Buick Lesabre codes P0131, P0171, and P1133.


Sounds like you just need to replace the one or two 02 sensors on bank 1.If you have over 100,000 miles the 02 sensos are realy to be replaced just as spark plugs and air filteres. If you wait to long to replace them you take a chance of them not comming out and then when they do go bad you will need to replace the exhaust as well.Hope this helps and good luck.

May 16, 2010 | 2002 Buick LeSabre

1 Answer

1998 Regal LS sputters/stalls; alternator keeps failing


i'd say you have a ground problem if you are burning up alternators... sorry if that don't help... i would have to see car to better appreciate problem.

Mar 22, 2010 | 1998 Buick Regal

1 Answer

My 2003 Buick Regal is running like ****


Per your description, it sounds as though you have a stuck injector. I assume you have a service engine light on. Take the vehicle to your local Auto Zone or Advance Auto Parts and ask them to scan the car for trouble codes, they will scan the vehicle at no charge to you.
Write the codes down and respond back to this post and we can get started.
Let me know.
Regards,

Sep 09, 2009 | 2003 Buick Regal

3 Answers

Check engine light on a 2001 Toyota Corolla


No need to replace the MAF. If it was bad, the check engine light would have come right back on as soon as you started the engine. The MAF not only measures the air going into the engine, but also measures the air temperature. Those 2 circuits are constantly sending info the the ECU. If either would fail, the ECU would light the check engine light. P0171 is a common code for incorrect readings (dirty) in the MAF. Cleaning it always helps, and cuts off the light. Your acceleration problem may be either a wrong Air-Fuel sensor (the one before the cat), or an "aftermarket" AF sensor. "Aftermarket" AF sensors have been shown to not work properly in Toyota vehicles. Hope this helps

Sep 27, 2008 | 2001 Toyota Corolla

2 Answers

Sputtering


You more the likely a bad set of spark plug wires You need to replace them

Jun 03, 2008 | 2001 Buick LeSabre

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