What could be common reasons behind the check engine light being on in my SAAB?

Answer by  Taz (193)

If there is no unusual noises made by you car, one of the reasons why a "check engire" may appear without any evident reason may be as simple as your gaz cap is not well shut. If that's the case, open you gaz cap and shut it again, turn it until you ear a click.

Answer by  bb (674)

the check engine light could be an indication that you have a bad sensor such as an oxygen sensor or a air flow sensor.

Answer by  Amber40 (24961)

Without knowing more about the car I can't safely safe. You need to have someone check the codes with a code reader. Autozone or Advance should scan it for free.

Answer by  peters (296)

Check engine lights are always emissions related. This can range from a gas cap being loose to needing a new catalytic convertor. Most auto parts stores will pull the codes to give you a better idea of what the actual problem is.