Okay, I ran an onboard diagnostics on my 90 Deville after the "service engine soon" light came on after a long period of time in idle. The computer gave me an E49 code which my hubbie, (who's currently out of town) assures me that it is a Map Sensor and can wait until he can fix it. My question is how do I reset the computer so that the check engine light goes out? The bright orange light is kinda freaking the kids out. Thanks in advance!