2001 VW Cabrio constantly has codes P1500 & P0121. Replaced Throttle Body & Fuel Pump Relay. These 2 codes were not present till Throttle Body & relay were replaed and TCM flashed at dealer.
Vehicle came in with lack of power complaint. After following diagnostic flow charts from Identifix found Throttle Body to be bad. Replaced TB & Fuel Pump Relay at same time. TCM was flashed at dealer. After it was flashed the codes P1500 & P0121 started showing up.
Wednesday, March 14th, 2012 AT 1:40 AM