2006 XC70 Im still trying to sort this code out. Went to my local mechanic to see if his reader is any different than mine. Both came up with 9400= Accelerator Pedal Sensor. Symptoms: When I start the car, the dash reads "Reduced Engine Performance". Shut it off...start again, dash message gone. Hook up reader- 9400. That part is expensive. FCP shows that it is included in a new pedal, not separate. Is there a way (without VIDA- no one I know has VIDA here on Long Island) to determine if I REALLY need the Pedal Sensor before spending $250?