The Check Engine light is an important clue. Once it turns on, a diagnostic fault code has been memorized in the engine computer. If the problem doesn't occur again, the code will be erased automatically after about 50 starts, so it's important to have the code(s) read before that valuable information is lost. The code refers to a circuit or system with the problem, not the specific part.
Again, do you feel the vibration when the car is standing still? If so, that leaves out anything related to the brakes, steering, tires, or suspension systems. The vibration could be an engine misfire which could be related to the Check Engine light.
If the car must be moving, a vibration in the steering wheel that only occurs above around 45 - 50 mph could be a tire out-of-balance. At real low speeds, a bent wheel or broken belt in a tire could be the cause. If the vibration is stronger when braking, suspect a warped brake rotor.
Wednesday, February 10th, 2010 AT 10:21 PM