I have a 2004 Cadillac DeVille. The Check Engine soon light comes on. The scanner tells me that the following codes PO 121 PO 122 The Throttle Position Sensor is malfunctioning How much does this part cost? Where can I purchase it for my mechanic who has a garage in Gatineau, Quebec, Canada. I was told to look on the Internet on the Web site called Pelican Parts, but I can't find it there. Can you help a lady in distress? Thank you. Louise
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