LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Opti symptoms

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Old Jul 4, 2010 | 02:23 PM
  #31  
vmatt350's Avatar
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From: Valdosta, GA
Originally Posted by Injuneer
DTC 16 is set when the PCM does not see the low res pulse from the Opti for two crank revolutions. There is nothing else that will set the code.
Ok, so now that DTC is not coming back, why is the DTC 41 coming up? I just replaced the ICM and it will fire off but will only run for a second.

What gives?
Old Jul 4, 2010 | 10:35 PM
  #32  
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Did you work your way through the DTC 41 diagnostic chart from the factory manual?
Old Jul 5, 2010 | 06:46 AM
  #33  
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From: Valdosta, GA
Originally Posted by Injuneer
Did you work your way through the DTC 41 diagnostic chart from the factory manual?
Yes, thats what told me to replace the ICM.
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