Question about 2003 Toyota Corolla

1 Answer

Toyota Camry 2004 P0420

I have Toyota Camry Special edition 2004. I am getting check engine light "on". After computer check I found the code P0420. It also provide little description about the code that Catalyst System Efficiency below threshold.

I need to know what to do now. Thanks in advance for the help.

Posted by on

  • Anonymous Feb 09, 2009

    i have the same problem before, so i change the 02 sensor and reset the code everything works fine, after driving it for a couple of days the check eng lights again and and now it gives me a PO135. what will i do now? should i change the 02 sensor again?

×

1 Answer

  • 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.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,114 Answers

Well that's if I'm not mistaken, catalyst system efficiency THRESHOLD!!! it is "bank" when your description code explanes bank 1 that is a O 2 sensor anything says BANK is a Oxygen sensor = O 2 sensor.what is it doing shutting off when eng warms up or sputtering or nothing really out of normal behavior? these switches will loose all communication with computer or get stuck in 1 of three ranges each range behave differently! in each range the deal with these are these switches are a part of maintenance usa @ hundred thousand km they should be change for emission efficiency and fuel consumption and vehicle performance usually after 1 is changed 9 times out of 10 shortly after the next bank will produce eng light and so on!! I usually change both while I'm at it you know pay me now or pay me again later but twice as much! well hope this helps you out good luck cheers happy new year.John, Toronto,Ontario

Posted on Jan 03, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2001 Toyota Sienna CEL displayed code P1150 & P0420 what could be the problem


Mine is a 2001 Sienna LE. I got the P0420 code and the dealer want to replace an engine control computer for $1600. I've found posts that say you can replace your oxygen sensors, which still costs around $100 each. The P0420 seems to be emissions related. When my check engine light comes on, I run the highest grade, no ethanol gas, and usually within a couple of tanks, the light goes off again. The last time it happened about 2 wks ago, I put in the 93 octane no ethanol premium and a can of Seafoam and within a half a tank, the light went out. Your problem might be more serious, and I don't know what the 1150 code is, but so far that's worked for me.

May 17, 2012 | 2001 Toyota Sienna

1 Answer

2001 Toyota Camry - check engine light on - code p0420 - took to mechanic and he just hooked up code scanner and gave p0420 code - without checking anything else he said rear O2 sensor needs to be...


Hello: Code 420 normally indicates a catalytic converter is operating below 60% efficiency. You need to take your car to another shop and request a COMPLETE diagnosis not a dart board guess.

Sep 13, 2011 | 2001 Toyota Camry

1 Answer

Check engine light on. The codes are P0420 catalyst efficiency and P0505 idle control system. What do I need to do to fix this??


You need a catalitic converter p0420. Possible iac motor p0505...need to diagnose this recommend dealer

Oct 05, 2010 | 2000 Toyota Camry

1 Answer

P0420 code


This means that the secondary O2 sensor detects that the catalytic converter isn't working as efficiently as it should.
This engine code can be triggered by any one of the following:

1.) The catalyst in the catalytic converter is cracked, clogged, or otherwise damaged.
2.) The secondary O2 sensor is malfunctioning.
3.) There is an exhaust leak.
4.) The computer unit is faulty.

Aug 24, 2009 | 2002 Toyota Camry

1 Answer

Repair Codes - B2796, P0750 and P0420.


B2796 is no communication in Immobiliser system, which means you or some one else try to use a key transponder to start the car.
you need some one to clear that code. it doen't affect the car performance.
P0750 is shift Solenoid malfunction, you hsould have engine management light on the dash. this you can call the dealer, I believe this is cover by Toyota service bulletin.
http://www.mediafire.com/?jjmootmytfz
P0420 is O2 oxygen sensors.Toyota has issued a service bulletin regarding the P0420 trouble code that could apply to your vehicle, to be sure if this bulletin applies to your car I will need the VIN# and e-mail to tedrttr@yahoo.com with that information.

May 19, 2009 | 2002 Toyota Camry

2 Answers

Engine check light read p0171 and p0420, noticed a leak of engine oil on cylinder 2 area of head gasket when checking the sparks plug, is that the cause?


P0171 code is described as: lean condition bank 1, oxy sensor 1. If your vehicle is a 4 cylinder, which I believe it is.. you have got a lean air/fuel mixture being found by the ecm(computer).This can be caused by several things. The first of which is a possible vacuum leak at or near the intake manifold. This can also be caused by a MAF(Mass Air Flow) sensor problem or even by something as simple as a clogged fuel filter. This lean condition could also be the cause of the P0420 :described as a catalyst efficiency problem. It would be best to have the vehicle taken to a reputable repair facility that is capable of engine performance diagnostics and have them run tests for these codes. The gasket you mention is most likely a valve cover gasket not the head gasket and would not cause these codes. Although you should have this leak fixed before it becomes a problem.

Hope this helps..

Apr 20, 2009 | 2003 Toyota Camry

1 Answer

1997 toyota camry check engine light on,code po440,po420,po441,


P0420 is catalyst system efficiency below threshold (bank 1)

P0440 is evaporative emission control system malfunction

P0441 is evaporative emission control system incorrect purge flow

Mar 29, 2009 | 1997 Toyota Camry

1 Answer

The Check engine light on my 1994 Toyota Camry came on about a month ago and has refused to go off, though it did briefly on a day my mechanic cleaned the battery Terminals and tightened the screws, but it...


Your mechanic should be able to read the codes with a special device he/she hooks up to your car's computer.

Your car has a computer that stores codes when something needs repair or maintenance.

The Check Engine light is on because the computer has a code stored in it.

Mar 25, 2009 | 1994 Toyota Camry

1 Answer

1998 toyota camry V6


P0420 indicates you have a catalyst efficiency issue; replacement of the Air-Fuel Sensor should take care of that;
The P0441, P0446 and (I assume P0440); you said 446 twice, indicates a faulty or loose fuel cap; it is not sealing properly.
Please feel free to respond to me if you have any further questions.
A FixYa rating from you regarding my assistance would be greatly appreciated.

Dec 27, 2008 | 1998 Toyota Camry

1 Answer

2003 toyota camry


P0420 is a cat code. Sometimes, you can replace the upstream & downstream air/fuel & O2 sensors, run some good fuel injection cleaner thru it, and that might fix the problem. If not, you may need to replace the cat. Note that the cat is covered under warranty for 8 yrs/80,000 miles. Toyota will replace it if it has gone bad, for free.

Aug 30, 2008 | 2003 Toyota Camry

Not finding what you are looking for?
2003 Toyota Corolla Logo

990 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...