96 grand voyager service engine soon light

I have a 1996 grand voyager se 3.3L, the service engine soon light just came on, Can someone please tell me the way to reset it and how to obtain any fault codes, Thank you

You can try the key dance: OFF/On, OFF/ON, OFF/ON within 5 seconds any codes present will either show up on the odometer as a (Example: P0135) or count the flashes of the service engine light (Example: 1 flash pause flash, flash means code 12)

Post your codes or do a search for code defintions.

Also post your symptoms, mileage on vehicle, any info that would be helpful to others diagnose problem.

Ok the codes are 12 , 17 , 32 , 31 , 55. The van has no problems that I know of but I am chasing a problem with the heater core not blowing hot air. The only things that I know of is that the radiator fans have been hacked into And I am going to work on those now, and that the heater control for hot or cold is broken, The actual arm that sticks out to slide to cold or hot was broken off but I can manually put a small screwdriver in the slot and move it. thanks for your help and any suggestions.

Here is a site with the code definitions:

http://www.allpar.com/fix/codes/faults/code-32.html

What does the temperature gauge show when engine warmed up??
Sounds like the thermostat is stuck open.

Check your EGR valve.