2005 Honda Accord Oxygen Sensor Repeat Replacement

Asked by Apr 13, 2015 at 01:29 PM about the 2005 Honda Accord Coupe EX w/ Leather

Question type: Maintenance & Repair

My Check Engine Light (CEL) came on a few months ago while running smoothly, and
I later found out the oxygen sensor broke. I got it repaired, and, a few weeks later, the
CEL came on again with the same message. My auto repair shop fixed it free of
charge and indicated they may have installed a defective part. Last week, the CEL
came on again! They again replaced it free of charge with a Honda part. The shop
said they talked with the Honda dealership and indicated it could mean a broken rear
catalytic converter. This sounds like poor initial diagnosis of the problem.

Has anyone had a problem like this before? If so, what was the root cause, and how
did you get it fixed?

Thank you!

3 Answers

3,305

If the diagnosis was made using nothing more then the CEL trouble code and they just replaced that part, it doesn't mean a poor diagnosis. You did say the O2 sensor was broken, so did you mean physically broken or just stopped working? There is a big difference between those two words. Also, brand new out of the box parts have been known to be non-operable right out of the package, because in most cases every single part produced is NOT tested, the usually take them off the line at random and do tests on them. So if the first one was "burned out", not broken, and the replacement your mechanic put in the second time(third sensor) free of charge, stopped working, obviously the converter could or would be the cause, so if the second one simply burned out, common sense should tell a mechanic to check the converter as the cause. Certain car makes and models seem to just "eat up" O2 Sensors, while others never have a problem at all with them, which may actually indicate a design flaw in the systems, which almost no manufacturer will easily or voluntarily admit to. The FIX for a faulty or bad catalytic converter is to replace it.

1 of 1 people found this helpful.

Thanks for helping me to understand that. I'm not sure if the part looked physically broken or if it just stopped working but looked ok. I don't yet understand why a broken catalytic converter would break multiple O2 sensors though. Wouldn't the O2 sensor just tell you the O2 levels weren't right?

3,305

The O2 sensor is one of many sensors that work to tell the cars computer things like air temperature, air flow and many other types of readings in addition to the exhaust fumes being either high in or low in oxygen content, and the computer is constantly changing the air flow and fuel mixture, and how long of an electrical pulse to the fuel (how long each injector stays open allowing the flow of fuel to each cylinder), injectors to emit the lowest possible amount of toxic fumes being released by the engine. The catalytic converter has certain elements inside it that the fumes pass thru which, further reduces the amount of pollutants released into the air. When a catalytic converter "breaks", it usually has broken down to the point where the elements stop doing their job with the fumes being emitted, or it can physically become clogged, and the fumes cannot pass through it and that eventually makes the O2 sensor "burn out", or stop working. This is the simplest explanation I can give you that a normal person can understand, and I am sure it is not as near to everything these sensors and converters actually do, but it should help you understand. So basically, if the elements in the converter break down and don't do their job anymore, it can cause the sensor to burn out and stop working then the sensor would need to be to be replaced. Since this has happened to three sensors now, it stands to reason that most likely the converter has failed which causes the sensors to fail, so the converter needs to be replaced or it will keep burning out the sensors. The O2 sensors do more than just tell you the O2 levels are out of adjustment, and are constantly taking readings and telling the computer to make adjustments and over time the entire process could then cause other sensors and input output monitors to fail or set other trouble codes. A "bad" converter can actually keep the car from running at all, and if it is clogged bad enough it can get so hot it can set the car on fire.

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Accord Coupe

Looking for a Used Accord Coupe in your area?

CarGurus has 10,520 nationwide Accord Coupe listings starting at $1,995.

ZIP:

Search Honda Accord Coupe Questions

Honda Accord Coupe Experts

#1 wsampson4
wsampson4
Reputation 260
#2 Tom Demyan
Tom Demyan
Reputation 220
#3 Joe Finis Sr.
Joe Finis Sr.
Reputation 200
View All

Related Models For Sale

Used Honda Accord
813 Great Deals out of 84,287 listings starting at $1,050
Used Honda Civic Coupe
188 Great Deals out of 16,851 listings starting at $800
Used Honda Civic
657 Great Deals out of 88,603 listings starting at $995
Used Acura TL
233 Great Deals out of 6,297 listings starting at $999
Used Ford Mustang
476 Great Deals out of 45,735 listings starting at $1,999
Used Toyota Camry
1,001 Great Deals out of 90,918 listings starting at $650
Used BMW 3 Series
974 Great Deals out of 31,729 listings starting at $1,000
Used Nissan Maxima
305 Great Deals out of 25,213 listings starting at $999
Used Nissan Altima
1,031 Great Deals out of 81,562 listings starting at $1,200
Used INFINITI G35
99 Great Deals out of 3,184 listings starting at $2,000
Used Dodge Charger
405 Great Deals out of 28,172 listings starting at $1,988

Used Cars For Sale

2017 Honda Accord Coupe For Sale
5,238 listings starting at $20,573
2016 Honda Accord Coupe For Sale
13 Great Deals out of 1,248 listings starting at $16,989
2015 Honda Accord Coupe For Sale
31 Great Deals out of 499 listings starting at $13,995
2014 Honda Accord Coupe For Sale
31 Great Deals out of 816 listings starting at $12,500
2013 Honda Accord Coupe For Sale
23 Great Deals out of 460 listings starting at $9,591

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.