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Toyota Camry Check Engine Light - Catalytic Converter

72 messages,  Last post on Nov 25, 2009 at 8:57 AM

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#10 of 72 Faulty Catalytic Converter?? by reppy Nov 27, 2008 (11:02 pm)
I have a 2006 Camry LE V6 with about 90k miles. It drives fine BUT for this problem. When ever I accelerate, it vibrates. The harder the acceleration, the harder you notice the vibration. If i am maintaining same speed irrespective of how fast, it rolls just fine. if i accelerate slow, you might not notice the rattle. I have had my check in engine light on for some weeks now. I have been to the dealership about this vibration and they say its the catalytic converter. I am wondering, can this really be the cause of the vibration on acceleration? I am thinking after reading posts here, that something should have made it go bad. However, these guys are not telling me anything thing like that. They just told me I need to change the front and the rear and slam me a bill of $1900 to get both cat converters replaced. I really want to be sure this is the cause of my problem. any suggestions to the cause of this vibration? Thanks folks.
#11 of 72 engine light on, computer reads catalytic system by chovi Dec 08, 2008 (5:58 pm)
My Camry is a 2001 and has a little bit over 150,000 miles. A week ago I went to my mechanic an he told me that needed to change the 2 O2 sensors, which he did and an hour later the light went on again, the cat was changed a little over 2 years and did not a problem until last couple of months. My question is, do you think I will need to change the cat again? Replies to this message: rearwheeldrive (Dec 08, 2008 6:23 pm)
#12 of 72 Re: engine light on, computer reads catalytic system [chovi] by rearwheeldrive Dec 08, 2008 (6:23 pm)
Replying to: chovi (Dec 08, 2008 5:58 pm) Doubt if Catalytic Converter is causing the car to run bad.    The exhaust is already gone and in the converter and doesn't effect engine unless there is a back pressure issue. This could cause loss of power and backfiring and eventual shut-off.   Instead get the code for the Catalytic Conv. problem. The code can be read with a tool at Autozone. They will check it for you for free. Theres so many codes for the electronic ignition and emission system. This will narrow it down to a specific symptom.   The converter could effect the pollution if raw gas gets in it. A bad ignition coil causes raw fuel to go out the exhaust ruining it over time. This would may cause a higher reading of Nitrous gases or the Hydrocarbons it is suppose to burn in the converter.   The post before mentions poor acceleration. This could be a bad ignition part like the wire or coils if it has separate coils for each cylinder. If not it might just be a spark plug wire going bad.
#13 of 72 02 Camry LE 4 cyl - 2nd catalytic conv replacement by talen316 Jan 03, 2009 (3:32 pm)
I've got an 02 Camry LE 4cyl with ~ 254k miles and just had to replace the catalytic converter for the second time.   Had to replace the catalytic converter when the check engine light came on for the first time back in 11/04 when the vehicle had 139k miles. Toyota was kind enough to do a "good will" no charge warranty replacement.   Once again within the past 6 mos or so, the check engine light came back on again and catalytic converter needed replacement again. Total cost to repair at Dealer this time around was $617 which included $377 for the part, $53 for gaskets and $187 for labor.   According to my dealer, I should expect this to occur every 100k miles give or take. He further explained that today's fuel mixtures are harder on the cat converters, thus causing them to fail earlier/more frequently. Don't know if this is true or not, but this is what my dealer told me so take it FWIW.   Other then the issues with the cat converter, I can't complain much about the reliability of my Camry as I've pretty much had 254k trouble free miles and going strong. Replies to this message: kiawah (Jan 03, 2009 4:35 pm) talen316 (Jan 11, 2009 9:07 am)
#14 of 72 Re: 02 Camry LE 4 cyl - 2nd catalytic conv replacement [talen316] by kiawah Jan 03, 2009 (4:35 pm)
Replying to: talen316 (Jan 03, 2009 3:32 pm) Where do you live that you are racking up that many miles each day? That's great service from that 4 cylinder, hope I'm as lucky! Replies to this message: talen316 (Jan 11, 2009 9:07 am)
#15 of 72 Re: 02 Camry LE 4 cyl - 2nd catalytic conv replacement [kiawah] by talen316 Jan 11, 2009 (9:07 am)
Replying to: kiawah (Jan 03, 2009 4:35 pm) Charlotte metro area... Wife drove the Camry first couple of years and logged a ton of miles due to multi-state territory. Now, it gets driven as daily commuter car up and down I-77. At 255k miles, it shows no signs of slowing down. People that get in it can't believe the mileage it has on it given its condition. Here's wishing you as many trouble free miles with yours as we've had with ours...
#16 of 72 Re: 1999 4Cyl Check Engine Light - Catalytic Converter [chet01588] by ssub Jan 20, 2009 (7:39 am)
Replying to: chet01588 (Nov 11, 2007 4:36 pm) FYI: I have a 1999 4Cyl Camery LE. Check engine light came ON at 56k, took it to the dealer. They asked $110 for the diag. & end of diag. asked to replace the Cat. converter $850. I took the car to my mechanic and he suggested that it could be sensor or converter, we changed the sensor first (sensor+labor $250) and re-seted the check engine light. so far its running good 57500miles now.
#17 of 72 2001 Toyota Camry 4Cyl Ck Eng Lt, P0420 by tmoney4 Feb 01, 2009 (9:08 am)
I have a 2001 Toyota Camry LE w/124k miles(Original Owner) and the check engine light came on about a week ago. I took it to a auto parts store and they checked the computer with a code reader. The Code P0420 appeared and said 'Catalyst Efficiency Below Threshold, Bank 1'. Both O2 sensors have been replaced within 25k miles. In the Haynes book, it talked about A/F sensor. I would like to know if could be this sensor, the catalytic converter or the 2 other O2 sensors(Upstream sensor replaced by Dealer and downstream replaced w/aftermarket). Is it normal for a catalytic converter to go bad...I thought they last pretty long. I would like to take care of the problem myself...especially how the economy is but at the same time if I have to go to the dealer, I will go because I like my car. Which sensor should I replace or is the catalytic converter bad? Thanks! Replies to this message: grizz17 (Mar 09, 2009 8:44 am) toptech (Mar 09, 2009 3:41 pm) azmustang (Mar 25, 2009 8:29 pm) and 4 more... chet01588 (Mar 09, 2009 3:56 pm)
#18 of 72 2004 Toyota Camry 4Cyl Ck Eng Lt, P0420 by ab4d Feb 27, 2009 (4:20 pm)
I am dealing with the exact same issue on my 04 Camry with 152k on the odometer. About a week ago the check engine light came on. I own a code reader which indicated that the upstream O2 sensor had failed. I went to the local autoparts store to purchase the sensor and was advised that I should replace both the upstream and downstream (below the converter) sensors at the same time. The funny thing is the sensors were boxed as aftermarket Bosch, but actually the upstream was stamped "Toyota" and the downstream was stamped "Denso" which I believe both are OEM Toyota.   I went ahead and installed both sensors and the check engine light disappeared for about a day. The next day about halfway home from work (80 miles one way) the check engine light came on again, this time giving the code of P0420 which indicates the converter has failed.   I took the car to the dealer and asked them to check the new sensors to ensure that I had not recieved a bad sensor. The dealer did not bother to test them, and just assumed that they were good. He quoted $795.00 to replace the converter which he did not have in stock. I asked him how did he know that the converter was bad, and did he test the emissions from the tailpipe? He advised that he did not have the equipment to test the emissions and also admited that if the downstream sensor was bad it would indicate P0420.   My advice is to get the emissions from the tailpipe checked before you shell out for a converter, I know I am. Replies to this message: toptech (Mar 04, 2009 5:23 pm) tmoney4 (Mar 04, 2009 8:19 pm) toptech (Mar 05, 2009 4:19 pm) and 1 more...
#19 of 72 Re: 2004 Toyota Camry 4Cyl Ck Eng Lt, P0420 [ab4d] by toptech Mar 04, 2009 (5:23 pm)
Replying to: ab4d (Feb 27, 2009 4:20 pm) First Id like to say I have fixed a lot of the po 420 codes on california and fedaral emission camrys 4 and 6 cyl. 9 out of 10 times it is from a failing cat. I have never ever seen a rear sensor cause a po 420 code. As a sensor fails It generally gets lazy not switching fast enough. On a car with a working cat the rear 02 sensor should look lazy and have very little activity at all, unlike like the frt air fuel sensor on a calif car, or an 02 sensor on a federal. If u have not noticed way to many waste money on the sensors because they have no clue what they are looking at It is very easy to diagnose this code if u have any clue what u are doing.The frt air fuel sensor can only be tested using a lab scope. Also aftermarket cats absolutely do not work on california emissions vehicles or they work for an extremely short time .On the later model camry 4cyl around 97 to 02? They have 2 cats one in the manifold and one in the frt pipe. If u are having the 420 code u could opt to try changing the front cat ( part of the frt manifold) As it is substantially cheaper then the rear. But both are monitored by the computer. I bet these people changing cats every 6 months are putting on junk aftermarket!!!!!!! The rear factory cat is around 1100 no way u are changing that every 6 months. And if the vehicle is running correctly easy to ck by cking fuel trims should last 100k or more. Please any questions u can e mail me.brad2500hdaol.com Replies to this message: tmoney4 (Mar 04, 2009 8:19 pm) toptech (Mar 05, 2009 4:19 pm) tmoney4 (Mar 05, 2009 8:08 pm)

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