What code reader are you using. A non Porsche specific one basic one won't give you all the codes
Measure the resistance of the wheel sensors. It could be one going bad
They should all be aropund the same, 1.6k ohm IIRC
I had a abs failure a little while ago and it was on sensor that was bad and it read significantly lower in resistance than the others
I ought a used on on ebay for ~ $35 and all is good now
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2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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