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Old 08-06-14, 09:44 AM   #1
bigge31566
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I have too many check eng. codes P0420, P0440, P0441, P0446, P1354, P0300, P0304, P0306, is there one thing causing all this or do I need to get rid of car. 2000 Lexus ES300 279000 miles and replaced catalytic converter last year
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Old 08-06-14, 12:13 PM   #2
lostape45
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I had the p1354 code which also triggered the p300, p304, p306 codes as a misfire. My car needed a new oil control valve and simply would not run right without getting it fixed. Cost was $200 for me. As for p440, p441, and p446, that is a general code combination for the charcoal canister. Again I had this code pop up but it happened to be a disconnected vacuum line that hooked up to the airbox. After that I cleared the code and it disappeared. I have no previous experience with P420 but I can only imagine that your bank one cat is bad based on the code info.
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Old 08-06-14, 06:28 PM   #3
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If you allowed the misfire to go on for too long then this could be deleterious to the converter. What brand converter did you install last year? Toyota does not like aftermarket converters.
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Old 08-06-14, 06:59 PM   #4
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I bought both my Oil Control Valves from Amazon. Unfortunately it looks like the previous owner of mine didn't take care of the car. Long story short.
Only cost 40 to 50 dollars for shipping. Easy enough to do it your self. Been working fine for over a year now 30k+ miles.

P0300, P0304, P0306
You would need bank 2 oil control valve for these.

As for the rest I don't know. My p0420 comes on from time to time but doesn't seem to affect me at all.
1999 Lexus ES300
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