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P1550 Code


ACES70

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vehicle speed is aquired through the ABS module by averaging the front 2 wheel speeds, then sent to the network to the ECM, instrument cluster, ect

well since I already look like a bonehead in this thread , was there any volvo that had the speedo sensor on the transmission ?

or is that the Cruise control sensor ???

I am confused at this point and time ?

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If you erase the code and in time the light somes back on you can most of the time bank on a bad ABS module. The fact that you put new tires on wont set the abs light as long as the wheels and tires are the same diameter/circumference. Like someone said remove the wheels and make sure that the wheel speed sensors and exciter rings are intact, if they are then you probably have a high speed network communication problem ie:ABS Module. Hope this helps.

-Matt

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