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service engine soon light on

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Old Jun 22, 2009 | 02:28 AM
  #1  
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Default service engine soon light on

I have done a forum search and no answer.

On a 1987 C4 how do I reset, turn off, the "Service Engine Soon" light?

Been on for a year now and finally getting to me
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Old Jun 22, 2009 | 04:59 AM
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You need to check for the code that made it come on, but to turn it off or clear the codes disconnect negative battery cable for a couple of minutes, but if the problem is still there it will come back on.
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Old Jun 22, 2009 | 05:15 AM
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Originally Posted by floridamale
You need to check for the code that made it come on, but to turn it off or clear the codes disconnect negative battery cable for a couple of minutes, but if the problem is still there it will come back on.
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Old Jun 22, 2009 | 07:05 AM
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Originally Posted by eylesda
I have done a forum search and no answer.

On a 1987 C4 how do I reset, turn off, the "Service Engine Soon" light?

Been on for a year now and finally getting to me
Pull the code, fix the problem, then disconnect the battery for 10 minutes.





Ground A and B with paper clip, turn key on, and count the flashes as described HERE Write down any trouble code(s)



Now go here and fix the problem(s).

Trouble Codes
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Old Jun 22, 2009 | 07:39 AM
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no reason to pull battery cable.
Just take the ECM fuse out for a few minutes.
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Old Jun 22, 2009 | 11:03 AM
  #6  
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Just stick a piece of tape over it. YGBSM!!

Originally Posted by eylesda

Been on for a year now and finally getting to me
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Old Jun 22, 2009 | 11:48 AM
  #7  
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Originally Posted by MK 82
Just stick a piece of tape over it. YGBSM!!
This is not really a answer
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Old Jun 22, 2009 | 02:16 PM
  #8  
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Originally Posted by Joslinm
no reason to pull battery cable.
Just take the ECM fuse out for a few minutes.




When the SES light came on in the '88, it was a loose connection on the EGR pigtail.
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Old Jun 22, 2009 | 02:27 PM
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Neither is ignoring it for a year.


Originally Posted by floridamale
This is not really a answer
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