How do you reset a 2003 buick regal Ls
20

Asked by Deorpheus Jan 10, 2015 at 10:07 PM about the 2003 Buick Regal LS Sedan FWD

Question type: General

2 Answers
30,485

Tom answered 9 years ago

Normally it's the O2 sensor in the emission system not sending the correct signal to the OBC (.5VDC). I have had some real problems lately with catalytic converters being partially clogged ... causing lost performance and the dreaded CEL (check engine light)

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