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I have a 2005 Toyota Camry V6.

The check engine light was on for while and I cleared it once using an OBD2 reader. It didn't come up for while. I used the .87 petrol and I thought that is what causing the issue. So I mixed some premium gas and the check engine light got turned off. Now I'm still with same gas mixture and the check engine light is turned on. I couldn't find the issue since the drive on my car is smooth.

I read the error code using a odb2 reader and P0430 was the error code. I checked a couple of places online but couldn't really find what could be the issue might me.

I have replaced Spark plugs, Air filter, PCV valve, transmission oil and engine oil.

Attachment : these are the reading from my car (did a freeze frame and took picture of the error. Any suggestions/opinions are welcomed.

enter image description here OBD2 reader

Zaid
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still_learning
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2 Answers2

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While in theory this could be caused by a faulty O2 sensor reporting invalid data, I believe it is more typical for this kind of error to actually be what it says, i.e. catalyst system efficiency is below threshold.

Have you replaced your catalytic converter? Is it original or aftermarket? I would start the diagnosis by trying to replace the cat. Yes, it is more expensive than changing your engine oil, but then again it's more likely to fix the error code permanently.

A faulty catalytic converter will not result in a non-smooth ride. The engine works perfectly with a degraded catalyst.

juhist
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I've had this error on two Honda Civics, new cat resolved them both. I was able to mail order new cats for less than $100 each. Got $75 from the recycler when I turned the old one's in.

If you have a jack, jackstands, and basic tools (screwdrivers, ratchet set) you should be able to replace it yourself, if you like.

Borrowed an O2 sensor socket from the local autoparts store.

Best of luck!

Tim Nevins
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