Question about 1999 Chevrolet Express
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Posted on Jan 02, 2017
most any sensor going bad can cause the check engine light to come on,try disconnecting the posative battery cable for 15 seconds ,then put it back on,will reset the codes, or take it to auto zone,they will test your computer for codes at no charge to you.i had a venture van my was ox. sensor. thanks robert b.
Posted on Jun 17, 2009
SOURCE: check engine light emission leak
youll have to take it a shop and have them fill the system with "smoke" and examine the entire system for the "smoke". the smoke will pour out from where ever it is leaking from
Posted on Jul 15, 2009
Reset the ECU / PCM for Check Engine light removing the neg battery cable for 5 minutes to reset the codes. If the warnin glight come on again, I suggest scanning you vehicle for details, one fault is in there.
Good luck (remember rated this help).
Posted on Oct 30, 2009
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