Question about 2000 Toyota Tundra

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What is the P0420 code on my 2004 toyota tundra

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The P0420 CODE IS INSUFFICIENT CATALYTIC FLOW , FIRST CHECK OTHER SENSORS BEFORE REPLACING THE CATALYTIC CONVERTOR, CHECK YOU REAR OXYGEN SENSOR TO MAKE SURE IT IS WORKING FINE, THEN CHECK YOUR EGR VALVE, MAKE SURE IT IS NOT LEAKING, CHECK YOU MASS AIR FLOW METER IF IT HAS ONE OR AIR FUEL RATIO SENSOR, THIS WILL BE THE TOP OXYGEN SENSOR. IF ALL GOOD THE CAT IS THE PROBLEM, THAT IS THE TOP CAT.

Posted on May 09, 2014

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Posted on Jan 02, 2017

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Opelmanz
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SOURCE: door panel toyota

three steps.

1. locate screw holes for door handle (and other areas maybe) and remove. the screws may be located behind plugs that you remove with small flat screw driver
2. disconnect and remove power lock/window unit, usually pries up from one end (rear of car) and slides out. be careful not to stracth leather or upholstry
3. using screwdriver, pry bar, nail bar or other flat piece of metal pry panel away from door one clip at a time. try to pry near the clip, otherwise you risk damaging the panel's interior

post another problem if you get further and still have trouble.

paul

Posted on Oct 26, 2008

  • 1114 Answers

SOURCE: Toyota Camry 2004 P0420

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

  • 362 Answers

SOURCE: Where do you add transmission fluid to a 2004 toyota tundra auto

You add Transmission fluid through the dipstick tube, you will need a small funnel, you can buy one at a local auto parts store.
With the engine warm and the truck in park and running, pull out dipstick, wipe it clean, replace, then pull out and check level.
Let me know if you need further assistance.
Please rate this solution.
Lone99star

Posted on Apr 03, 2009

seanpwright
  • 2030 Answers

SOURCE: 01 toyota tundra stalls at idle....engine code

That relates to your Cat. Convertor and the emission system. Most likely cause is either a bad Cat. Conv. or a deffective O2 sensor.

The only real way to tell is to have it hooked up to a full functioning scan tool, not just a code reader; and see what all the output readings are and go from there. If you have high miles I would change the O2 sensor for that bank first, if ou want to take a chance on an easy fix.....it never hurts to install a new O2 sensor after 50-60,000 miles...it can only help the car.

Posted on Sep 09, 2009

SOURCE: 2004 lincoln ls has p0420 code c ev o oh e

If you have a 2004 lincoln ls,the PO420 is-- Catalyst System Efficiency Below Threshold. ( Bank 1) The list of possible causes are long. I have the same vehicle, and the Emissions Manual,which is several hundred dollars. Don't let anyone tell you it is a bad Converter. It may be, but it is only six years old. I would check for codes. The ignition coils (Coil-On-Plug) go bad on all Fords and a misfire, resulting overheating of exhaust system etc,will set all kinds of codes,and they may not be related, to the real issues. Lincoln is where one of everything goes,when it comes to the latest technology. Check that the O2 Sensors are screwed in tight. Later on you may need to have them checked out,if no ignition issues or malfunctioning coolant temp sensor issues. Use only 5-20 Oil. I use Mobil 1 synthetic. Hopefully your not using any,and ruining the converter. Make sure you have the system full of coolant,including the Degas container,the one where antifreeze mix goes. Remember GO5 Yellow antifreeze on ford products. Also bleed the hose next to the brake booster to let out air,in the coolant system. You can check for above normal fuel pressure. I would not go to a Dealer and spend more than necessary. Find a good shop that knows these vehicles. You can't fix every problem on all makes that come thru your doors today. Hope I give you a start on things to have checked. I would stand in the service bay by the car and have the tech prove what is wrong before I would authorize any part replacement.

Posted on Apr 07, 2010

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