My dads Range Rover always says this even after i clear the code, so the problem is must be real.

well i can drive it or he can at most 100 miles before the service engine now light comes back on.

is there a check engine light too?

car drives amazing even when the light is in on.

just strange becauese i have one and drive way more than he does and my rover has more miles and is touble free both are the same year 2001

any advice will help