Inhave a 2001 f150 4wd 5.4l with 398,000 miles. For the past week I have had excessive vibrations that feels like i am on a bucking horse when I go above 40 mph. I had all tires balanced. Replaced the front passenger wheel hub assembly. And still not any better. Could bad shocks or struts be...

Is there a scan tool provision to determine when the engine goes into closed loop operation? I could note the temperatures at that time.

My 2001 F150 is a 5th generation F150 but also a 10th generation F series - what is the more common designation among F150 owners?

At low speed (5mph) with my foot lightly pressing the brake, my ABS activates and starts running the HCU. It makes the typical low groaning noise for as long as my foot is on the brake until the vehicle stops. Eventually, the ABS will fault out and shut itself off and illuminate the warning...

Here's a graph of my mileage for the past 17 years