New to the forum but not new to Pontiac, this cars my 3rd Grand Prix (2nd GTP) and i love it.
P1689 Traction Control System Delivered Torque Circut Fault is what code the cars coming up with. It runs smooth until half throttle then starts fluttering and shuddering and missing and dont have the power. If i dont go over half throttle or dont hit the gas to quick leaving a light it dont skip a beat and runs awesome. It almost seemed like the cat was getting plugged but i emiminated that option yesterday and its still doing the same darn thing. Any help would be appreciated guys!Its 1999 Supercharged 3800 with 180k miles.
