The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to AutoZone or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
yes
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
Engine check urgently
Did you try unhooking the battery
Auto Zone or Advance Auto Parts will check your codes for free.
With an OBD2 code reader
It means you need to hook up to a computer with the Volvo software and pull codes.
the oxygen sensor(sensors)
With an OBD2 code reader
Yes it does. The proper way to check automatic transmission fluid is to check it while engine is at idle.
It is the one next to the service light.....second to the right.
Check for a vacuum leak Check the check valve on the power brake booster