Replace oxygen sensors?

This is a common problem to replace the oxygen and fuel air ratio sensors here is a guide to help walk you through with diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

That code is for one of the oxygen sensors after one of the catalytic converters. The first step is to find the meaning of the code. Our listings don't cover that number. There can be a dozen or more fault codes related to just one of the oxygen sensors and they mean very different things.

If a circuit problem is indicated, the most common cause is a problem with the wiring or corrosion on connector terminals.

Hello,

Here are all of the oxygen sensor locations for both the 4 and 6 cylinder engine along with a guide to show you how to change them. The guide isnt vehicle specific, but it will show you what to do

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Here are the oxygen sensor locations (below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

Take it to a shop and tell them you need all codes pulled. Then get back to us on what you find out. CarMD is OK, but it doesn't pull everything.

We don't normally get involved with part numbers here because we don't have access to that information, but I did find something in some other reference material. The first number appears to be one of two for the "upstream" sensor, meaning before the catalytic converter. The second number also appears to be correct, one of two listed for the downstream sensor after the catalytic converter. You'll only get a sensor with those numbers from the dealer. If you go to any auto parts store, they will give you the correct part with that company's number on it.

There are dozens of diagnostic fault codes related to the oxygen sensors but none of them ever say to replace parts or that one is defective. Those codes only indicate the circuit or system that needs further diagnosis. If your mechanic followed normal procedure and diagnosed the need for a new sensor, he has to tell you which one or you have to know the fault code number to know which sensor it made reference to.

Whether you can do this yourself depends on your skill, tools, and whether you can get to the right sensor. You have the same arms and hands as any mechanic so that won't limit your ability. Some oxygen sensors are right in front, on top of the exhaust manifold, and easy to remove. Some are buried underneath and you have to stand on your head and whimper to get to them. Some can be removed with a box wrench. For some, there are special sockets with a notch on the side for the wires to come through. Some sensors are rusted tight and some come out pretty easily. This is where lack of experience can make you lose faith in what you're doing when you're really just running into one of the difficult sensors.

As a general rule, if the correct sensor is easy to replace, the labor cost to let your mechanic do it won't be very high. If there's a mistake to be made, it's up to him to solve it, not you. If the sensor is really difficult to get to or to get loose, you might want him to do it too so YOU don't get the bleeding knuckles, bumped head, and dirt falling into your eyes.

Do you have a check engine light and last tune-up?

Clean out the idle air control valve and EGR/PCV valves and also the MAF sensor with an electronic cleaner CRC also check the TPS sensor

Hi there,

These can rust in quite badly, give it a good soak with a spray type lube, you can get a specially designed socket that makes this job easier, just don't round off the nut section or you will be in strife getting it out then.

Mark (mhpautos)

Depends on what the code is, Converter should be left on the car, if you want to pass inspection! This may be a reprogram of the cars computer(PCM) or it may need an 02 sensor. If it's0420 there is a fix and this is it:
M.I.L. "ON" DTC P0420
PRODUCTION CHANGE INFORMATION
TECHNICAL SERVICE BULLETIN
Reference Number(s): EG024-04, Â Date of Issue: Â April 03, 2007; July 27, 2004; July 07, 2004 TOYOTA:'02 - '04 Camry (2AZ-FE) (Non PZEV) SECTION:Engine Superceded Bulletin(s):, Â Date of Issue: Â July 01, 2004 Related Ref Number(s): EG024-04
All previous versions of this TSB should be discarded.
The repair procedure in this TSB is similar to TSB No. EG013-04 "Excessive Sulfur Dioxide Odor. " The recalibration of the ECM (PCM) should only be performed ONCE.

Page 1 of 1
April 3, 2007: A new step 3 and Figure 2 have been added to the ECM Reprogram Procedure (regarding removal of the 10A ECU-IG fuse). Previous Figure 2 is now Figure 3. July 27, 2004: The OP Code in the Warranty Information table has been changed from Combo A to Combo B. July 7, 2004: The Parts Information, Warranty Information, Applicable Vehicles and the Note in the Introduction have been changed.
Some 2002 - 2004 model year Camry vehicles equipped with the 4 cylinder (2AZ-FE) engine may exhibit a M.I.L. "ON" condition with Diagnostic Trouble Code (DTC) P0420 (Catalyst System Efficiency Below Threshold, Bank 1) in the Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM). The ECM (PCM) logic has been modified and a redesigned catalyst has been provided.
2002 - 2004 model year Camry vehicles equipped with the 2AZ-FE engine (non PZEV) and automatic transmission produced BEFORE the Production Change Effective VINs shown below.
10/29/2009
I will email the entire Tech bulliten so you can check the VIN against the bulliten.

Yes it does happen
But we have on hand a repair heilcoil O2 repair kit
It works great almost every time so far

He emailed this
Yes, it does happen "", I know it happens, because thats why I asked the question, is this normal, what could have happened, was the air sensor removed incorrectly, Do you only get partial answers based on the "donation", this is a "HELP " forum?

Thanks,

please hit replay to question, quicker to get your question answered

Its so common that I would say it happens 7 out of 10
Reason why we have the repair kit on hand

I very much doupt that it was their mistak
as it screws into the manifold and the exhaust pipe