This means that something may be wrong with your engine. Take it in to a mechanic and get everything checked out.
you should have your engine checked out to make sure everything is working well
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
When a vehicles engine is maintained as recommended you will have a longer engine life. There will also be less repairs over time, and the fuel mileage will be higher.
No, the mileage is stored in the body and engine computers.No, the mileage is stored in the body and engine computers.
The "Service" light is just a maintenance reminder that is triggered on mileage. The "Check Engine" light is triggered by emissions system problems. Typically the O2 sensors trigger the check engine light but also a fuel cap that is not tightened, or a misfiring cylinder.
That varies from engine to engine. A rule of thumb is, the slower your speed the better your mileage.
They are about the same in fuel mileage but the 6.0 is thirsty.
Get your engine checked
Not necessarily- it all depends upon how well maintained the engine has been, and also whether it's the vehicles' original engine or not. A high-mileage engine that has been well looked after and cared for, will be in a better running condition than a low-mileage one that hasn't. Also, if the vehicle has had a replacement engine fitted, then mileage will be irrelevant anyway as far as the engine's condition is concerned.
It depends on the engine. 100k, 200k, or 300k
Take it to Autozone and have them read the check engine error code. That's where you start.