The Emission Maintenance Reminder System (EMR) is incorporated into the engine Powertrain Control Module (PCM). On 1989 to 1995 models, the Chrysler Diagnosis Read-Out Box II (DRB II) is required to reset the EMR. If you have an 88 keep serching b/c the solution is much easier.
I discovered this answer on a recent search (Mar2008), but print it and take it to the mechanic with you. After years of ignoring my light, my local 5 STAR service people said they didn't know jack about an "old" Dakota. I took three of their stars when I left!
aperantly take the light out
To reset the maintenance required warning light on a 1989 Dodge Dakota, unhook the battery connector cables for 10 minutes. Reconnect them and start the vehicle.
That requires a scan tool.
The maintenance light,You will need to take it to a Dodge dealer to reset it. Or get a DBR-2 code scanner.BIG $$$
What do the REQD light mean on my dashboard of my 1993 Dodge Dakota 3.9L Truck
Take the bulb out
A scan tool is required.A scan tool is required.
If it's anything like my Dodge Dakota, the maintenance required light is to inform you that the emissions system is due for an inspection. Some earlier models had a button behind instrument cluster to reset it, but I've been told that on my 89 Dakota it requires a trip to the dealer. It doesn't indicate a problem, just a cruel trick to make you visit the dealer! I just took the bulb out of mine.
it means when the maintenance light is on
Turn the key on, with the engine off, and press the gas pedal 3 times.
To reset the maintenance required light on a 1989 Dodge D50, disconnect the battery. Leave it disconnected for 10 minutes before reconnecting it.
The Maintenance Required Light is not the same as the Check Engine Light. The Maintenance Required Light is telling you that there is scheduled maintenance that needs to be performed. It may mean it needs an oil/filter change. To find out what needs to be done look at the maintenance schedule in your owner's manual.