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Guest
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Hello I have a cayman's 2006 and I get error code p0421 I think its warm up cat efficiency below threshold bank 1.only 28k on the car all stock
__________________ This post was auto-generated based upon a question asked on our tech article page here: Porsche Boxster Oxygen Sensor Replacement - 986 / 987 (1997-08) - Pelican Parts Technical Article |
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06-12-2017, 01:35 PM
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Moderator
Join Date: Jul 2012
Location: New England
Posts: 3,189
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Either a faulty cat or an exhaust leak.
- Nick |
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06-12-2017, 01:35 PM
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