Question about 2002 Pontiac Grand Prix

2 Answers

I HAVE PROBLEM MY CAR WAS ON CODE PO420 I LIKE TO KNOW WHO MUCH I CAN DRIVE IS TO DANGERS TO DRIVE. PLEASE CAN YOU TELL ME WHAT IS PROBLEM AND HOW LONG I CAN WAIT WI

WHAT IS PO420

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.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 444 Answers

PO420 code has to do with the oxagen sensors, But allso can be triggered if there is a leak in the (Exuast) System some where, If the (Exuast) System is good ,Problem is with a oxagen sensor, If not replaced it can do damage to the cat (Converter) That is verry costly to have replaced,

Posted on Nov 02, 2012

Testimonial: "BEFORE I BRING MY CAR TO FIX , HOW LONG IS SAFE FOR ME TO DRIVE CAR , ALSO TEST TELL ME IS CATALYTIC CONVERTER SO PLEASE TELL SOME MECHANIC IS CLOSED DURING WEATHER SO MOST TOWN WITHOUT POWER, BUT I LIKE TO KNOW CAN I DRIVE CAR WITH THIS PROBLEM TILL I GET NEXT WEEK SOMEBODY IN SHOP. HOW MUCH IS SAFE AND IS THERE DANGER TO DRIVE AND WHAT MOST IS IMPORTANT TO WATCH . THANK YOU ENRA.."

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

  • Contributor
  • 23 Answers

As long as you do not keep driving the car for the next six months...these problens will not overnight damage your car...however it needs to be checked and fixed ASAP...

Posted on Aug 10, 2014

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My car is not wanting to shift


code p 0420 refers to cat converter system, bank 1 --efficiency below threshold ====causes ---cat converter faulty( probably blocking the exhaust system) wiring--- HO2S faulty ( heated oxygen sensor in the exhaust manifold on bank 1 ( closest to the firewall)

Jun 21, 2016 | Mazda 626 Cars & Trucks

1 Answer

2000 Lincoln Ls V8 still getting code PO420 after replaceing Cat Conv,changed 02 sensors, still getting code PO420 and now when exiting the freeway the car turns off.... have to put it in park to restart...


Check your MAF sensor readings. ( MASS AIR FLOW ). You probably need to clean out your throttle body. If it's not reading properly, it could def. kill your car. Hope this helps, James Booth. Please rate this. :))

May 20, 2011 | 2000 Lincoln LS

1 Answer

The check engine light came on on my 2004 Pontiac Vibe 1.8. Code PO420 came up on my code reader "catalyst system efficiency below threshold bank 1. Also on the face of the reader the C (cat monitor)...


My first thought would be the converter considering the codes....which will cause the sensors/heaters and other components to fail or read as being bad... I would call a dealer and make sure there are no recalls on the emissions systems and anything to do with the vehicle..
Also it would be worth your while to scan it with a TECH 2 scanner......You may have one I dont know......But I worked for Buick/Pontiac/GMC for 5 years and TECH 2 was a life saver...
It will tell you everything !! If it is running fine though I would just change the oxygen sensor,
clear the codes,test drive it then check it again.....But if you have no problem with it and hooked it to an emissions analyzer and it showed ok I wouldnt worry....

Mar 02, 2011 | Pontiac Vibe Cars & Trucks

1 Answer

Hi my 2001 buick lesabre has a diagnosic code of po420.....My car will die while Im driving . Can u tell me what this is??


P0420 indicates a problem with catalyst efficiency on bank 1 of the engine. It is likely that the catalytic converter is faulty.

Aug 12, 2010 | Buick LeSabre Cars & Trucks

1 Answer

What is this code po420 bank 1 in a che?vy monte


I could go on and on about Po420 code but it's easyer to tell you to go to www.po420.com and everything you want to know and then some is there. Let me know if this was helpfull..4 thumbs up !

Feb 24, 2010 | 2002 Chevrolet Monte Carlo

5 Answers

Po420 haunting me 03 jetta 1.8t


You're going to have to have the codes read and find out what is setting that light on. After that problem is repaired, the car must indeed complete a drive cycle, not nessacarily 200 miles. This lets the computer run all it's tests and set all its readiness monitors. If you know what the code number is now, post it and I'll tell you the most likely cause, and repair.

Feb 04, 2010 | 1998 Volkswagen Jetta

2 Answers

2000 corolla with trouble code po420


If the code has cleared on its own then you need to disconnect the battery and re-connect it. This will clear the codes out of the memory. If you don't want to do this you can go to an auto parts strore and have them hook the little computer up to your car and they can clear out the code as well.

Sep 02, 2009 | 2002 Toyota Camry

2 Answers

2000 Mazda Miata, check engine light comes on. Code PO420


I HAVE A 2000 MAZDA MIATA AND IT IS BRINGING UP A CODE PO421, CAN YOU TELL ME WHAT THAT IS

Dec 15, 2008 | 2000 Mazda MX-5 Miata

2 Answers

Honda civic code PO420


Code P0420 Catalyst System Efficiency Below Threshold (Bank #1) Can't really say if driving it that long would cause damage.

Jun 14, 2008 | 2000 Honda Civic

1 Answer

CROWN VICTORIA CODE PPO420


Disconnect your battery for five minutes. That will reset your computer. When the problem happens again, take your car to Auto Zone or Advanced Auto. They have a code reader and will tell you what the problem is. This is a free service. Good luck

Jun 05, 2008 | 1999 Ford Crown Victoria

Not finding what you are looking for?
2002 Pontiac Grand Prix Logo

314 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

75744 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8123 Answers

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

Answer questions

Manuals & User Guides

Loading...