Question about Lincoln LS

1 Answer

Changed cat conv, changed o2 sensors, code PO420 keeps showing up so does check enginelight????? new problem now, when exitiing the freeway car shuts completly off??? its done this a few times now. i have to put it in park & restart it & it seems ok... help please, i would appreciate it

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Lincoln Master
  • 14,585 Answers

Some cars can not have a generic converter put on them. Replacing this and the 02 sensors should have fix the code problem. Depending on your car I would check the converter. And if you had it done at a shop take it back. If your car has to have a specific converter and it got a generic one, this would eventually cause the car to stall.

Posted on May 20, 2011

Ad

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I eplace all o2 sensor and cat ,can not get rid of engine code po420


Well you have done everything. check wiring or replace the ECM. If you took this to a shop. Find another shop.

Aug 06, 2015 | Cars & Trucks

2 Answers

Enginelight on code po420


Hello: If your o2 sensors are all ok and you have no exhaust leaks the what po420 means is the catalytic converter is at or below 60 per cent efficiency. To correct the converter will have to be replaced. Check on the internet you can get one a lot cheaper than from a Lincoln dealer and it has the same warranty as the original.

Aug 18, 2011 | 2001 Lincoln Continental

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...


Could be a fuel pump issue, there was a tsb on fuel pumps going bad, although it was usually a problem with the jet pump. The main fuel pump, in the left side of the tank as I remember would pump it dry, and the jet pump wouldnt pump to the other tank, therefor over heating and possibly popping the fuse for the fuel pumps. You can take the lower part of the back seat out and then gain access through the floor to the tanks. id try to change the fuel filter first. It could also be a regulator or injectors

May 20, 2011 | 2000 Lincoln LS

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

2 Answers

Catalyst system efficiency below threshold


is that the code you get from comp is PO420 eng light if so worst news either you have an exh leak between o2 sensor 1 and o2 sensor 2 or the front o2 sensor is lazy or the front catyletic converter is not working

basicaly code is only triggerd when engine is hot and the front o2 sensor and the rear o2 sensor read the same voltage when conv is working the front o2 sensor will fluctuate rapidly from 0v to 1v and rear o2 sensor will remain steady at 0.5v

try to explain best i can plz vote comment or reply if you need more help

Jan 17, 2011 | Chevrolet Astro Cars & Trucks

2 Answers

PO420 code-service engine light is on


P0420 Catalyst System Efficiency Below Threshold (Bank 1) first thing to do is go back to basics do a tune up (plugs) check the plug wires spray them with water or windex if you get a miss change them, run some fuel injector cleaner through it, don't just throw parts on it ,that is'nt cheap

Mar 24, 2010 | 2002 Nissan Altima

2 Answers

I have a 2003 Nissan Sentra SE-R Spec V. o2 sensor location?!?1


theres always one on the intake manifold working its way down to catalytic convertor is the oxygen sensor 1 heater circuit(pre cat conv) signal while terminal #25 is oxygen sensor 2 heater circuit (post cat conv)

Feb 12, 2010 | Nissan Sentra Cars & Trucks

1 Answer

Nissan fronteir codes are P0420, P0430 what has failed


po420 and430 is telling that the catalyst converters are no good both, most of the time bad o2 sensors maake computer think cat is no good, the way it tests is if o2 sensor reading before cat is about the same as the one after cat computer asumes cat is not bruning exhaust good , iwould replace o2 sensors reset check engine light and go from there, that might be the problem,if you were to replace cat o2s should be done at that time,so do o2s first,good luck.

Nov 05, 2009 | 2003 Nissan Frontier Crew Cab

2 Answers

Fault code po420 ; is problem sensors or is it the cat conv


The only thing that will set this code is the catalytic converter or the oxygen sensor behind it. Way to tell if it is the sensor is to monitor voltage reading with scan tool and see if it is fluctuating the same as the upstream oxygen sensor. If it is the converter is "free flowing" and will have to be replaced. If the sensor is "flatlined" then it is most likely bad and setting the code.

Apr 30, 2009 | Ford Fusion Cars & Trucks

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

Related Topics:

71 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lincoln Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

fordexpert

Level 3 Expert

5546 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

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

Answer questions

Manuals & User Guides

Loading...