The Reduce Engine Power light was on, i already put a new pedal sensor and the light still on, so I bought a new throttle body unit but I don't know how to relearn it and the light still on.
RepairPal Certified shops can diagnose and repair your 2005 Saturn Ion. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
You need a good GM scan tool but you can try disconnecting the battery for about 30 minutes too.Use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex