Question about 2000 Toyota Corolla

1 Answer

Dash board,head light,tail ligts stays on when engine is off

Its was ok when we went to jersey city but when we came home i saw the engine light on so i used my OBD tester and it appear that the code is P0420 and then i erased the diagnostic trouble code but the problem is when i turn off the engine the dash board,head light,tail lights stays on,i perform the erase diagnostic trouble code but nothing happen the last thing i did is to disconnect the negative cicuit in the battery so it wont discharge the starter,can you please help me with this.

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.

  • Toyota Master
  • 1,861 Answers

The P0420 that you are getting may be an inoperative air/fuel sensor (the actual code is "catalyst system efficiency below threshold". This code will not affect the head/tail lamps or dash lights.
You may have a bad headlamp switch.

Posted on Sep 19, 2008

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.
Good luck!

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

My 2005 chevy equinox keeps showing problem code P0420 How do I fix this problem?


0 2 sensor near the catalytic converter or

replace the catalytic converter

The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar.

Read more at: https://www.obd-codes.com/p0420
Copyright OBD-Codes.com

https://www.obd-codes.com/p0420

Feb 03, 2017 | Cars & Trucks

1 Answer

Bad catalytic converter on 2000 Monte Carlo SS


My son put his tester on it, gave him the code ??????? What code ? P0430 -P0420
P0430 Catalyst System Efficiency Below Threshold (Bank 2)

P0420 - Catalyst System Efficiency Below Threshold Bank 1

Sorry but you don't have a chance of doing this . special tools ,cost you you as much as to take to a shop . buying cheap cat's won't work either .

Oct 25, 2017 | Cars & Trucks

2 Answers

What is wrong when this code shows up p0420 shows up..This is a 2006 nissan sentra


P0420 NISSAN - Catalytic Converter Efficiency Below Threshold Bank 1

The most common cause for the OBDII code P0420 on Nissan vehicles is the three way catalytic converter Bank 1 has reached the end of its useful life.. Since this is a very expensive part you need the code fully diagnosed as some other things like exhaust leaks or poor engine tune can cause it as well

Oct 05, 2012 | 2006 Nissan Sentra 1.8

1 Answer

P0420 code



Trouble Code: P0420

Catalyst System Low Efficiency (Bank 1)
Possible Causes:


Air leaks at the exhaust manifold or in the exhaust pipes Base engine problems (i.e., high engine oil or coolant usage.) Catalytic converter is damaged, contaminated or it has failed. Continuous engine misfire conditions, or weak or low coil output. Front HO2S or rear HO2S is contaminated with fuel or moisture. Rear HO2S is loose in the mounting hole (check it for a leak). Front HO2S older (aged) than the rear HO2S (HO2S-12 is lazy) .Here is what is listed in the Saturn repair guide.

Aug 29, 2012 | Cars & Trucks

1 Answer

2006 chevy cobalt(85000 miles) check engine light comes on and stays on. I am getting the check engine light code p0420. Engine seems to be running smoothly.


http://www.obd-codes.com/p0420

TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
there is a service bulletin for this.

http://www-odi.nhtsa.dot.gov/cars/problems/tsb/results.cfm?start=1&SearchType=DrillDown&type=VEHICLE&year=2005&make=CHEVROLET&model=COBALT&vehtype=PC&typenum=1&component_id=0&summary=true

Aug 02, 2011 | 2006 Chevrolet Cobalt

1 Answer

Grinding noise


When the service engine light come's on this means there is a problem with your car, you will need to find the code output for the service engine light , you can do this by using an OBD tester, underneath the drivers side dash there is a test port where the OBD tester plugs into, this will give you the specific reason for the service engine light, if you don't have an OBD tester or can't afford one some auto parts supplier stores will do this test for you at no cost.

Apr 08, 2010 | 2002 Oldsmobile Alero

2 Answers

My service engine soon light has been on for about a month...the car is running fine though...the day it came on i remember driving through a pretty deep puddle and later that night driving home it came on...


When the service engine light come's on this means there is a problem with your car, you will need to find the code output for the service engine light , you can do this by using an OBD tester, underneath the drivers side dash there is a test port where the OBD tester plugs into, this will give you the specific reason for the service engine light, if you don't have an OBD tester or can't afford one some auto parts supplier stores will do this test for you at no cost.

Mar 14, 2009 | 2002 Oldsmobile Alero

2 Answers

Trouble shooting P0420 code, bank 1, OBD II for 2000'?


misfiring can cause a P0420 code.
I would recommend a set of honda plug wires and plugs if the P0420 code returns.
I have used bolt in aftermarket bolt in catalytic converters but don't remember the brand name they fit ok and i have had 1 or 2 return with a P0420 code out of about 20. I have never replaced the oxygen sensor on a civic like yours.
I always fix the misfire problems, reset the computer, and have the customer drive it and see if the code p0420 returns. 50% don't have the P420 code return. drive it and see what happens and go from there.

Jan 06, 2009 | 2000 Honda Civic

1 Answer

D.I.Y OBD download terminals to jump to use check engine light to give codes


OBD 2 (96-2008) does not have that capability, older systems did up to the 1995 model year. You can buy a tester that does just codes on ebay for less than $40.00, live data stream testers are about double that.

Oct 15, 2008 | 1998 Cadillac Catera

Not finding what you are looking for?
2000 Toyota Corolla Logo

419 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

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

Answer questions

Manuals & User Guides

Loading...