2002 BMW 745i Base 8 Cyl 4.4L
just got my car service and my malfunction light reduced power light keep coming on.why
when i turn the car off it's goes away,but later comes back on
Well, it's a warning that something is not right in your engine and the ECM detects it through the inputs given by the sensors. Have your engine check by a scan tool to verify the fault. By this, you will able to save your engine from possible damage.