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Can a Throttle Pedal Sensor be cleaned in a 95 Volvo 850? on 1995 Volvo 850

Can a Throttle Pedal Sensor be cleaned in a 95 Volvo 850? Or can it be adjusted? Or does it need to be replaced.
OBDII error code read PO120 and PO122.

Asked by for the 1995 Volvo 850
Read these links. Will explain the codes.

http://www.obd-codes.com/p0120 http://www.obd-codes.com/p0122

I think you are dealing this a bigger problem than the sensor itself. In any case cleaning or adjusting probably wont do you any good. I have a feeling its in the wiring or PCM.