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po420 code


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paulrice
User

May 31, 2010, 7:38 AM

Post #1 of 2 (1295 views)
po420 code Sign In

2004 cadillac seville sls 4.9 po420 code bank 1 sitting in car bank 1 is on what side? i am going to replace the o2 sensor first on bank 1 but dont know what side bank 1 is


Hammer Time
Ultimate Carjunky / Moderator
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May 31, 2010, 8:06 AM

Post #2 of 2 (1292 views)
Re: po420 code Sign In

Don't waste your money. The O/2 isn't the problem. If you have no leaks in the exhaust system ahead of the converter, then you will have to replace the converter.

I assume you meant the engine size is 4.6 since they didn't make a 4.9 in 04

Bank one would be the right or rear side of the engine.



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