Why does the check engine light continue to come on on a 1997 sw2 w 172000 miles?
Use a computer code scanner to find out why the computer is displaying an error.
If the check engine light is on steady you should have it checked as soon as possible to avoid costly repairs, it may be a minor problem, however if the check engine light is flashing, have it checked immediately! If you continue to drive with the check engine flashing you risk catastrophic damage to the catalytic converters costing you big $$$.
If the check engine light is blinking with the engine running , a spark plug misfire has been detected - get it scanned for trouble codes in order to diagnose and then repair the problem as soon as possible . If you don't , and continue driving with the check engine light blinking , you risk damaging your catalytic converter