Cool 2003 Olds Alero Check Engine Light Ideas. Web the video above shows how to locate the on board diagnostics obd plug location on your 2003 echo, how to read the trouble codes and how to reset or clear the check engine. You would need to get the code read to see what it is, then fix the problem.
Repairpal will help you figure out whether it's your emissions system, sensor, catalytic converter, or something else. Web rowefast answered 7 years ago. 2004 oldsmobile alero 4 cyl automatic 76,000 miles.
