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PSM,ABS failure lights on dash


Model: 911 Turbo, Year:2002, Mileage:54,000, Type of use:Both Street & Track
I have a 2002 911 Turbo with 54,000 miles. For the last year or so i have noticed the PSM kicking in even with easy cornering. the car vibrates and brakes i guess like it should but only in a hard cornering aggressive turn. I tracked it for the first time this last weekend at Road Atlanta and had to drive with the PSM switched off which made my instructor nervous. With the PSM off after a couple of hard accelerations and hard braking the ABS failure light came on and said "take it to the service center" or something like that. It has happened before and once you turn the car off and then restart it the lights do not come back on until you do the same hard driving again. I have had the dealer check for codes and none were found. The PSM is extremely overactive making it impossible/unsafe to drive it with the PSM on in any kind of aggressive driving. Any thoughts? thanks

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