Codes for a 1998 Plymouth Voyager can be reset, by a diagnostic code scanner, or by disconnecting the battery. If the code is still showing up, after work has been done on the vehicle to fix the code problem, the vehicle may need to go into a car dealership to ensure there are not other problems causing a wrong code to show up.
The related link below gives the trouble codes for a 1995 grand voyager.
it is the completion of the codes
Turn the ignition key off and on three times. You will see the check engine light go off and on. Count the times the light goes off and on. Those are the codes.
Either with a scanner, or cycle key on, off,on,off,on. and count the flashes of the check engine light. three pause three would be 33
Diagnostic Code 51 for a 1994 Plymouth Voyager is the vehicle running too rich or too lean on fuel. Diagnostic Code 35 has to do with the cooling fan for the engine. It is not coming on at the proper times due to a short or a bad fuse.
The code numbers are two didgit codes. That was probably a 12 and a 55. 12 is start of message, 55 is end of message. Basically that means there are no trouble codes.
55 is end of message. It just means that the test is done and there are no more codes.
After reading the code, and repairing the codes, you reset code with a scan tool.
P0403 is a failed EGR solenoid. P1391 is intermittent loss of cam or crank sensor.
turn the key on and off 3 times and count the check engine flashes
depends, what kind of trans is if, if its a 3speed then that's as far as it should go. Have the engine and trans computers checked for trouble codes. The 4 speed will not shift when the computer detects a problem and sets a code.
You may have an electrical fault code. Have the codes read by a service tech.