Where is the TPS(throttle positioning sensor) on a 2001 volkswagen 1.8t?

Im got a check engine reading for TPS malfunction and air fuel metering malfunction. The TPS is a throttle control sensor but i cant seem to find it. Nothing comes up online and the "oh so helpful" people at auto zone dont know $&*@ about euro cars. The air fuel problem seems to be the mass air flow... show more Im got a check engine reading for TPS malfunction and air fuel metering malfunction. The TPS is a throttle control sensor but i cant seem to find it. Nothing comes up online and the "oh so helpful" people at auto zone dont know $&*@ about euro cars. The air fuel problem seems to be the mass air flow sensor...right? So if someone could please tell me where the throttle positioning sensor is it would be much appreciated.
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