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16815 Warm up catalyst efficiency below threshold (bank 2) 35-00--

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Old 11-25-2005, 08:05 PM
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Default 16815 Warm up catalyst efficiency below threshold (bank 2) 35-00--

I clear the code and then drove it for a day and it was fine,but the day right after the CEL comes on again and the same code comes up. I hope this does not mean my Catalytic converter is dead.

Please Advice!
Old 11-25-2005, 08:11 PM
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Default drive it more for few days

most likely the CEL will go away... the code will still be there, though.
Old 11-25-2005, 08:12 PM
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Default Re: drive it more for few days

but i have been clearing the code a few time and it always come back.
Old 11-25-2005, 08:16 PM
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that's the key - don't clear it
Old 11-25-2005, 08:17 PM
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Default Re: that's the key - don't clear it

oh, but how would I know if the cat is dead?
Old 11-25-2005, 08:29 PM
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Default Are you still under 80k miles?

If CEL stays after a week or two of daily driving, then yes, the cat is dead. Then, go to a dealer and have it replaced under warranty. If you're >80k miles, then it's up to you whether you want to spend $1,800+ for a new one or to explore a thorny path of a universal cat.
Old 11-25-2005, 08:43 PM
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Have competent tech clear codes and generate readiness code.
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