Question about 2002 Toyota Camry

2 Answers

P0420 and P0430

Ref. 2002 Camry V6... DTC = P0420 and P0430.

1) The car has two O2 sensors and two AF sensors....I replaced two O2 sensors to no avail... Is there another O2 sensor located downstream from the 3rd catalytic converter that's located underneath the car?

2) There are 3 catalytic converters... How do you test them?

3) Could the MAF or coil be causing this problem?

Posted by on

  • Anonymous Mar 26, 2014

    location of senor after catalytic converter

×

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 318 Answers

The AF sensors are uupstream and the O2 down stream. The car' s computer tests them and it is saying your cats are bad. If you have a scan tool you could look at the data and see what the sensors are seeing. The Af sensors are the ones that control the fuel ratio in the car while the O2's just watch. AF's would be the one to change but there is no garuatee that the codes won't come back.

Posted on Sep 25, 2009

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Toyota Expert
  • 235 Answers

2002 converter are part of manifold both sides but ther is also another converter behind the manifold rear converter there saying
420430 you replace manifolds and 02 sensors recheck to sweet if the third converter is needed the way I test them is to pull o2 sensor out and start car and see how much air gets through if there. Allot of air
The converter is clogged thank you please reply

Posted on Jul 01, 2015

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

DTC codes p0420 and p0430


Both codes mean the computer does not think the catalytic converter(s) are working correctly. The data is based on what the O2 sensors are sending to the engine computer.
There could be a problem with one of the cats, or one of the O2 sensors. You would need someone with a scanner that could watch the data stream from the sensors to figure it out.

Jul 27, 2014 | 2004 Lincoln Aviator

Tip

I get OBD codes P0420 and P0430



P0420 and P0430

P0420 means Catalyst System Efficiency Below Threshold, Bank 1

P0430 means Catalyst System Efficiency Below Threshold, Bank 2

It means that the O2 sensors are good, and the O2 sensors are telling you that your catalytic converter, in the exhaust system is not working fine, as its emissions are polluting the air too much.

The catalytic converter is part of the exhaust system. The way to test this part is by doing an emission test. The two OBD codes that you are getting are already a test telling you that the converter must be replaced, unless an emission test done at a garage says the opposite.

This kind of problem will trigger the check engine light, and your car will also waste too much fuel.
You also risk to get in trouble if the car goes through an Air Pollution control, as the car won't pass an emission test in this condition.

To conclude, the Catalyst System must be replaced, the O2 Sensors are fine.

This is a repair that should be done at a garage, however you can find DIY instructions here:How to Replace a Catalytic Converter or you can get more detailed instructions, and step by step illustrated procedure purchasing a repair manual.

on May 27, 2009 | 2003 Chrysler 300M

2 Answers

What can i do to fix p0420 & p0430 code.. 2005 ford expedition 5.4 ,,,, can you please tell me where is located p0010 code, A camshaft position actuator circuit/open bank 1... Same truck .. Thank you


p0420 and p0430 both indicate a clogged catalytic converter. the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. The p0010 indicates camshaft sensor. The camshaft sensor may be the main problem, as it will affect your timing and fuel/air ratio, which in turn can effect what your Oxygen sensors detect, throwing the p0420 and p0430.

Make sure your car is timed correctly by the timing chain/belt, reset light, then if it dont' solve the problem, change oxygen sensors, if those don't help, catalytic converter is clogged.

Dec 10, 2013 | Cars & Trucks

1 Answer

P0430 code


Hi there:

DTC P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
DTC P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

Could be some electrical problem, check wires and harnesses connections (cleaning job); also check description and testing HERE.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Sep 14, 2012 | 2005 Kia Sportage

1 Answer

Drive and idle is normal but suddenly check engine, pcs and vsc light come up. mechanic have checked. they said this car have few code. p0420, p0430, c1734, b2090, c1a40


ok lets do this in order
P0420 Catalyst System Efficiency Below Threshold (Bank 1) an o2 sensor bad usually before the Cat converter P0430 Catalyst System Efficiency Below Threshold (Bank 2) same thing but the sensor after the cat converter the c1734 people will say you need to replace a bad BCM, but don't,, once the O2 sensor problem is addressed , that code will clear , it has to do with the remote start b2090 has to do with power doors ,, this will drop off too once the system is rest , same with the last one you listed, If I was you I'd have the 2 O2 sensors checked, replace the bad one, or both, and have the mechanic clear all the codes, then recheck them

Aug 11, 2011 | Lexus LS 460 Cars & Trucks

2 Answers

I have p0420 on my 06 pont gp gt. it mostly comes on after I slow down after highway


Here is the trouble tree for that code it is most likely a bad cat but follow the trouble tree to see where it lead's you.
DTC P0420 or P0430

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Diagnostic Starting Point - Vehicle
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0420

* Catalyst System Low Efficiency Bank 1

Important: A new converter with less than 100 miles on it may set DTC P0420 or P0430 due to out-******* of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition. Hope this helps

Feb 01, 2011 | 2005 Pontiac Grand Prix

2 Answers

Need to pass emissions test, dianostic test - Catalyst efficiency blow threshold (bank 1) tried to order part - now I need to know if it pre or post, left or right Oxygen sensor, can it be determined by...


Yes it can be determined by the DTC (Data Trouble code). If the DTC is P0420 (catalyst system efficiency below threshold Bank-1) then the side of the engine with the #1 spark plug and cylinder is always Bank-1, and the O2 sensor that monitors the catalyst efficiency is usually after or (post) of the catalytic converter.

The #1 cylinder is located at the front spark plug on the right or the passenger side of the vehicle, so Bank-1 is on the right side of the vehicle, and the O2 sensor that monitors the catalyst efficiency should be located after or (post) of the catalytic converter. It would be the post right O2 sensor.

There is also the possibility that the catalytic converter is actually starting to fail, and if changing the O2 sensor and clearing the DTC does not solve the problem them the catalytic converter is most likely faulty.

Aug 12, 2010 | 2002 Jaguar X-Type

1 Answer

I have a 2002 toyota camry V6 and did not pass


O2 sensors are a possible cause. It has one converter, but 2 oxygen sensors...1 upstream, and 1 downstream of the converter. Which means one is very easy to get to (under the hood, on the manifold), and one is not. Usually the check engine light will come on if O2 sensors are faulty.

Apr 02, 2010 | 2002 Toyota Camry

1 Answer

What is P0430 trouble code


Code P0430 - For Continuous Memory Only -- Check for missfire detection monitor (dtc) -- Bank 2 catalyst system effciency is below acceptable threshold -- possible causes are
-Faulty HO2S
-Faulty ETC sensor
- High Fuel Pressure
- Damaged exhaust components
- Oil Contamination
- Cylinder Missfire
- Downstream O2 sensor improperly connected
- Retarted Spark Timing
Most times the problem is the Downstream O2 sensor is defective

Dec 08, 2009 | 2002 Ford Escape

2 Answers

P0420 & P0430 codes 99 silverado


codes p0420 and p0430 are both post o2 sensors, the ones after the convertor, both sides if replacing

May 17, 2009 | 1999 Chevrolet Silverado 1500

Not finding what you are looking for?
2002 Toyota Camry Logo

1,313 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8560 Answers

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

Answer questions

Manuals & User Guides

Loading...