How to manually check the codes for check engine light
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2000 Pontiac Bonneville
Question: manual check engine light
Answer #1mastertech6371 June 01, 2011, 06:58Master
you need a code reader. no other way.
even a reader will not tell you the failure, just the system failure.
let a shop do a real diag for you.
ReplyVisitor, June 01, 2011, 07:57
Thanks, some can access trough cars chip on dash...
ReplyVisitor, June 01, 2011, 09:26
chrysler can be done by cycling the ket 3 times but does not translate the code into terms we know without a manual. they are the only ones.