3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

code po633

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Old Dec 7, 2006 | 12:07 PM
  #1  
sterling's Avatar
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code po633

I have a PO633 code in my truck .
Anybody knows what it is?

strange thing is ,my predator have a code reader also but it did not come up on the predator.
Could it be happen before I loaded the predator?

thanx A.J
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Old Dec 7, 2006 | 12:11 PM
  #2  
Smkn600CTD's Avatar
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From: Oxnard, CA
Its the code for the security key not being recognized by the PCM because of the new software that is uploaded by the predator.

No biggie.
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