Question about 2001 Chevrolet Impala

1 Answer

What does error code p0420 in chevy impala 2001 mean ? how we can fix it?

Posted by on

  • Jeremy W.
    Jeremy W. Sep 28, 2010

    Its a code for Catalytic converter inefficiency. A new catalytic converter will usually take care of this. Be careful if you decide to go with an aftermarket cat. Some do not work as well as the O.E. cats and will continue to give you troubles.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Chevrolet Master
  • 5,332 Answers

I meant to post that as a solution.

Posted on Sep 28, 2010

Ad

2 Suggested Answers

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
  • 184 Answers

SOURCE: 2002 chevy impala p0420 code.

Probably a failed catalytic converter. More info at http://p0420.com

Posted on Apr 15, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have 2002 chevy impala changed the 02 sensor and it is still reading the same 02 sensor.


because its not the sensor.
its the plug for the sensor .the wires.or it
is the cataletic converter/exhaust system
i just replaced my exhaust on my 07 chevy malibu same o2 sensor issue p0420 or something like that ?!
replace the converter and youll be fine i still have my old sensors in there that gave me the code :)
there not saying there bad but that the cat is bad.

Mar 18, 2015 | 2002 Chevrolet Impala

1 Answer

2001 chevy impala problems


not sure what the question is? does the vehicle not start? does it not shift? or are you just posting a successful repair?

Jul 18, 2014 | 2001 Chevrolet Impala

1 Answer

2001 chevy impala error code P0756


That code is for the transmission. It indicates a mechanical failure within the transmission. There is a technical service bulletin issued by GM in regards to it. TSB# 01-07-30-036C. If the car is under warranty GM will fix it. If not, cost of repair will has to be paid by you. This issue is related to 2nd and 3rd gears, could has debris in orifice #29 inside transmission.

Nov 07, 2013 | 2000 Chevrolet Impala

1 Answer

P1404 code and p0420 car stalls


The P1404 means Driver Power Window Down Circuit Open
and the P0420 means Catalyst System Efficiency Below Threshold (Bank 1)
___________________
hid xenon headlight

Sep 18, 2012 | 2001 Chevrolet Impala

1 Answer

My catalytic converter is operating below factory recomendations, what needs to be fixed?


it was code P0420, this means the cat is worn out, they last about 100,000 miles in most cases, but it can vary allot

Mar 16, 2010 | 2002 Chevrolet Impala

1 Answer

2001 chevy impala has a P0420 code and a check engine light that will not reset. Earlier P-codes indicated a problem with cylinders 1-3. these codes reset after a while. Found intake vacuum house off on...


A code P0420 may mean that one or more of the following has happened:

An oxygen sensor is not reading (functioning) properly
The engine coolant temperature sensor is not working properly
Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
Retarded spark timing

Apr 04, 2009 | 2001 Chevrolet Impala

3 Answers

Code P0507


P0507-- idle speed high

Jun 02, 2008 | 2001 Chevrolet Impala

Not finding what you are looking for?
2001 Chevrolet Impala Logo

Related Topics:

797 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76682 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8531 Answers

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

Answer questions

Manuals & User Guides

Loading...