Question about Buick Century

2 Answers

Motor has 49,400 2002 buick century and the service engine light is on. Any other complaints or problem that are known. Local mechanic shows a code 420 but told me to take it to a GM dealer. Looking for additional owners with similar problem

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 422 Answers

I agree w\tripleauto

Posted on Aug 25, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,450 Answers

YOUR code is a catylyst efficiency below threshold.
what this means is the computer is seeing the catylitic convertor is not doing its job.
gm has an 8/80 warranty on the convertor you should be covered by that

Posted on Aug 25, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My 1993 Buick Century shuts off when idle.


Is there a service engine soon light on? If so take it to your local mechanic and have him hook it up on a PCM computer.

Dec 21, 2012 | 1993 Buick Century

2 Answers

My 2001 Buick Century is hesitating, having real problems climbing even the smallest hill. No smell or odor. I had the EGR Valve replaced 12 months ago. Service Engine Soon light comes on, but by the...


Sounds like a fuel pressure problem. If the light was on it still has the code stored in the ecm. A good shop can check the code and fuel pressure.

Apr 27, 2011 | 2001 Buick Century

1 Answer

What does that mean when my 1993 buick century jerks.. when i stop at a light then go it jerks


Your transmission is most likely slipping, you can get anti slip fluid at your local parts store, be sure not to overfill, you may be low on transmission fluid check the level. If this does'nt help there could be significant damage to the transmission. Motor mounts can have the same affect you can have your local mechanic inspect them. Usually a mechanic will check the motor mounts for little or no charge.

Mar 20, 2011 | 1993 Buick Century

1 Answer

Service engine soon light is on common causes


Take a trip to your local Auto Zone Parts Store or the like, there they will scan the computer for free and tell you exactly what codes are set in the system, what parts are showing problems, how much the parts are and where they are located in your vehicle to make replacement that much easier for you.
Happy Motoring!!

Jun 13, 2010 | 1997 Buick Century

1 Answer

2002 Buick Century showing P0446 and P0452


take it back to your mechanic and have him check it again, he may have missed something, or it has more wrong with it than he found on that visit.

Apr 22, 2010 | 2002 Buick Century

2 Answers

Valves ticking in my 1999 buick century


Did you check your oil level? Is the oil light on? (No oil pressure) try changing oil & install an engine additive for noisey lifters, If none of this works need to place lifters

Sep 12, 2009 | 1999 Buick Century

1 Answer

1987 Buick Century Limited V-6 engine w/ac. Engine cranks but won't start. Instrument panel light shows "Service Engine Soon". Also light shows "Oil Choke". And light shows picture of battery.


I took my car to my mechanic. He did a diagnostic circuit test on the engine and then replaced the distributer ignition module and camshaft and crankshaft position sensors.

Jun 18, 2009 | 1987 Buick Century

1 Answer

2003 Buick Century Custom and the Service Engine Soon Light


You will need to have a reputable mechanic do a diagnostic check on the car to determine the problem. This should pull up a code number in your car's computer and help point the mechanic and you in the direction of the malfunctioning part/s.

Just today, I had a diagnostic check done on mine for nearly $45.00. The mechanic was able to figure out the reason why my service engine light was staying on. I knew my car's radiator fans failed to run when car's engine was hot except when the A/C was running. I had changed out the sensors and was never able to get the light to go out or get the fans working. They were able to determine that the 25 amp fuse for the fans located under the hood was blown. After replacing it, the fans worked as they should, my car runs cooler and the engine service engine light is now out. Of course there are many possible reasons why the service engine light may come on including problems with the car's emissions. A reputable mechanic can solve your problem.

Apr 07, 2009 | 2003 Buick Century

1 Answer

"Service engine soon" light


take car to any local parts store and have them check for codes. or a auto repair shop or the dealer. i would take to local parts store cause they will do it for free and give you the codes and tell you what they mean

Oct 17, 2008 | 2001 Buick Century

1 Answer

Buick Century 1997


Replace spark plugs and wires. If thats not it, its your intake gasket. Mine did the same thing. I am working on putting my third intake gasket in my buick. 137740 miles

Aug 08, 2008 | 1997 Buick Century

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

188 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts

yadayada
yadayada

Level 3 Expert

60541 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

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

Answer questions

Manuals & User Guides

Loading...