I have a 2006 S60 2.5. Scanned it and received a P2135 & P0121 codes which both relate to the throttle position sensor. Does anyone know the difficulty in replacement and where to find the part. One dealership told me it would cost $450 for the parts and repairs and my local dealer told me it would be around $900 because they can not just replace the sensor and that they have to replace the entire throttle?