On my 2010 diesel Sonata on two occasions about 500 km in a 700 km trip the "check engine light" starts flashing. Stopping and checking oil/coolant/anything loose shows nothing. Car running perfectly , no smoke, no odd noises, temp good. I,ve unscrewed fuel tank cap after stopping ( hearing a blocked valve somewhere can cause problems as tank empties) and light stays on but not flashing. After another two hours or so of running light goes out. As well as the obvious question (whats going on?), does an error code stay after check engine lamp goes out to allow it to be read?. What parameters does the check engine light sense? Any info much appreciated. John
- posted
8 years ago