The maintenance required light on the dashboard illuminated?

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1990 PLYMOUTH VOYAGER
6 CYL
2WD
AUTOMATIC
97,000 MILES

1990 Plymouth Grand Voyager mileage: 97,000. Bob and Ken, Great web site. First time caller. Quick question. A few thousand miles back 75 or 80K the maintenance required light on the dashboard illuminated. My local mechanic said that Plymouth set those to go off based upon mileage on this particular vehicle. He reset the light. Guess what? It comes back on again recently. Stupid me did not ask for the reset steps. What are the procedures to reset that light? I hate to go buy a $50 manual for a van I plan to sell in a couple of months. Or, worse yet, pay a Plymouth dealer $200 to put the light out. BY the way, the van does not have any problems at all. Gas mileage is still in the upper 20s in the city and in the mid 30s on the highway. Oh yea the transmission was changed out (standard for these vans) at 88K. Thanks for the tip. Pat

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The check engine light can be extinguished by disconnecting the negative battery cable for approximately five minutes. However, the “check engine” light will “light” when there is a malfunction in the engine management system. The fault code is then stored in the computer. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. Because the check engine light indicates something is wrong, a trip to you neighborhood automobile service center sooner rather than later is recommended.