17-8 code is ABS System Disable for Dynamometer Test
This happens when you hold the test button down for too long when reading codes. This happen to me once, took me forever to figure out what was going on and how to fix.
I can't remember the specific sequence but it takes 2 people, one in the drivers seat pressing the brake pedal and one outside pressing the button.
Do some research on the ABS Dynamometer reset.
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Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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