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John Vollenweider
Joined: 02 Mar 2006 Posts: 52
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Posted: Mon May 03, 2010 9:03 am Post subject: PO420 code |
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with code po420 stored , what cat should I change?
Thanks,
John |
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edjack
Joined: 04 Feb 2002 Posts: 3887 Location: San Jose, CA
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Posted: Mon May 03, 2010 2:26 pm Post subject: |
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I can't remember, 6 or V8?
P0420 is bank 1, forward 3 cyl, or V8 right bank.
How many miles on the cats? Could also be a bad post-cat sensor. I'd change that first, unless the cats are rattling inside. Tap them with a rubber mallet. _________________
Ed BMW CCA member since 1987 (Nr. 62319).
'97 540i 6 speed Aspensilber over Aubergine interior. |
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