I have a 2006 Lincoln Navigator. The vehicle goes into safe mode while driving. I took it to Autozone for diagnostic and they told me that the throttle body needs to be cleaned. Is this possible and how is it done? This is a dangerous problem as the vehicle engine stays running in safe mode but does not allow any acceleration.
A dirty throttle body will not put the vehicle in safe mode. There is a sensor or other issue. The scanners they have a AZ can't read all of the codes. They most likely are not seeing the problem. It could be related to the transmission which will not show up for them.
You need to have it checked by someone with the proper equipment.