I was getting error codes on my Volvo and got one about the throttle position sensor not giving a signal. I unplugged it and turned the car on to see if it had been working. The motor worked poorly, yet similiar to what it did before i unplugged it. When i went to plug it back in, there was the red up arrow on my instrument panel blinking. I googled this and it said some stuff about transmissions, but i havent done anything to the transmission. Is there something i can do to reset this light? The car runs fine but i dont think the throttle position sensor is either working or the car went into its emergancy ECU mode and isnt using the signals.

It's your PNP switch, my 850 went through the same thing.

Here's how to replace it:

http://www.volvospeed.com/Repair/pnpswitch.php

May want to 'ratchet' the gear shift rapidly end to end, twenty times or so. (Engine off). COuld be PNP switch.

actually i forgot one thing - the lights on the sport/econ button are also blinking like the up arrow.

Mine stard doing that too.
Any idea what was wrong with it?.I'm planing to send mine to the shop tommorow.
Ady

I did the 20 shifts between gears and it's gone ...I think I'm good for a few months :).