i need to replace this
where is the throttle positioning sensor located on the 1999 volvo c70 conv. on 1999 Volvo C70
on the side of the throttle body.
This car has an electronic throttle (ETM), and the throttle position sensor is integrated into the throttle body. They had many issues with the ETM so get that checked before replacing anything. Volvo extended the warranty on the part, but you may be past that warranty.