yes
Did you try unhooking the battery
It is the one next to the service light.....second to the right.
With an OBD2 code reader
A check engine light displaying on a Volvo V40 means maintenance is needed on the car. Check the car's instruction manuals to see each mileage checkup recommended by the manufacturer.Ê
disconnect the battery for 1min or so the light will go off
the oxygen sensor(sensors)
With an OBD2 code reader
how do you reset engine light on 1991 volvo 240
check/align your PNP switch underneath the battery tray and slightly to the left. It looks sort of like a clamshell.
On the bottom right side of the instrument panel on the dash, next to the "Service" light.
if your car is still running fine it usually an o2 senser