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service engine soon light

This is a discussion on service engine soon light within the General Help forums, part of the LSx Technical Help Section category; it's a 2001 firebird (V-6) the catalytic converter started making a rattling noise when the motor was cold, but quit ...

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    service engine soon light

    it's a 2001 firebird (V-6)
    the catalytic converter started making a rattling noise when the motor was cold, but quit after it warmed up. not too long after that the light came on. autozone scanner said "catalyst effeciency low-bank 1". i put a new cat on and the light has not gone out. it has been driven about 85 miles. anyone know something i can try? thanks in advance. ryan.

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    How many miles? Stock cats are covered under the federal emissions warranty - 8 yrs/80K.

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    Senior Member greatwhiteZ28's Avatar
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    white
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    it might relearn it self, but long shot disconect the battery for a while then connect, then start, from what i heard

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    84,000 miles and i tried the battery, but only left it disconnected for a few minutes.

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    Moderator Firebirdjones's Avatar
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    You either have to clear the code with a scanner,,,not sure if the autozone code checkers can do that or not but worth a shot.

    Or,,,,,,,if the problem is truely fixed and the code was not cleared,,,,it will eventually clear itself after so many key cycles,,,not sure how many but it's up there,,,,like 30-40?

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    Senior Member greatwhiteZ28's Avatar
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    white
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    there is a relearn process that i heard of too, never tried it, but goes like this

    crank over, run for 5 min, turn off, key in on pos, for 5 min, turn off, drive for 5 min, im all most positve its not in order or correct but i have heard that process being discuss a while back

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