Question about 2004 Buick Regal

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I need to change my oxygen sensor in my 2004 buick regal

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First thing you have to do is figure out which on, it has four. You just have to unscrew it from the pipe and screw the new one in jsut make sure you do not touch the end of the new one because you can contaminate teh sensor.,

Posted on Oct 01, 2009

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2003 buick regal,3800. code 135 coming up. car runs til reaches operating temp,then will not idle. Is this O2 sensor failure?


P0139 - Oxygen Sensor Circuit Slow Response (Bank1, Sensor2)
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
Best advice check it out first!
DO NOT Shotgun it as in replace things until it works. You are blowing money at that point.

Dec 23, 2014 | 2003 Buick Regal

2 Answers

2001 buick lasabre rmp revs up and down then stalls out


There is a common misconception that a CODE READ and a DIAGNOSTIC TEST are one and the same.. They are most certainly NOT!
The first thing to have done is to verify that the engine has a misfire or not. Then if the misfire is present, determine what is the cause of the misfire. A misfire in and of itself will not cause n oxygen sensor to "burn out". However if the oxygen sensor is bad, it will cause a performance problem and also cause an idle issue. What needs to be done is to connect the vehicle to a scanner and observe the data when the problem is happening. That way you can know what the fuel mixture is and whether of not the oxygen sensors are working properly.
Unfortunately, there is a lot more to engine performance diagnostics than just a code reading.

Apr 28, 2014 | 2000 Buick Regal

1 Answer

Where are the oxygen sensors located on a 1994 Buick Regal Gran sport?


u may be right and i can look them up for u but it could also be the catalytic converter. mcelhannonelvis@hotmail.com

Aug 30, 2012 | Buick Regal Cars & Trucks

1 Answer

How to change catyletic converter 98 buick regal


ebay will be your best buy,bought mine there only took me 2 hours to put on,but remember to change your two oxygen sensors,one in the front and one next to the cat. under your car,buy your oxygen sensor at auto zone best price

Oct 08, 2011 | 1998 Buick Regal

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

2 Answers

Buick regal 92 3.8L Horrible fuel mileage


Sounds like you might have an oxygen sensor problem. Your catalytic converter(s) maybe defective or dirty. That in turn can dirty up the oxygen sensor. A defective oxygen sensor will send faulty info to the computer, interpreting the fumes as cold (even when the engine warms up). That causes the computer to adjust the fuel mixture to very rich, giving you poor gas mileage and the fuel smell. Hope it helps.

Mar 16, 2010 | 1992 Buick Regal

1 Answer

Buick error code 0141 What does this mean and where do I find the sensor that fixes this problem. The Buick is a 1996 Regal with a 3.8 V6


What does that mean? This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141. See also: P0135 (Bank 1, Sensor 1).
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook SymptomsYou will likely notice poor fuel economy the illumination of the Check Engine Light. Causes A code P0141 may mean that one or more of the following has happened:
  • open or short to ground in the wiring harness
  • O2 heater circuit wiring high resistance
  • O2 heater element resistance is high
  • Internal short or open in the heater element
Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.
Possible Solutions
  • Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
  • Repair short or open or high resistance in wiring harness or harness connectors

Feb 19, 2010 | 1996 Buick Regal Olympic Gold

1 Answer

1991 buick regal


Congested catalayic convertor will pose this problem. Less expensive problems could be oxygen sensor, or if your vehicle is equiped a catalayic sensor.

Feb 19, 2010 | 1991 Buick Regal

2 Answers

2003 Buick Regal Service Engine Soon light.


The error that I'm showing for error code P1133 is 
P1133 Heated Oxygen Sensor (HO2S) insufficient switching bank 1 sensor 1(Rear Bank).  I would suggest having both of your Oxygen Sensors replaced if you haven't already had that done.  Hope this helps.  Thanks for an honest rating and for using FixYa.

May 19, 2009 | 2003 Buick Regal

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