The check engine light on a 2000 Plymouth Grand Voyager will come on when an error is detected by the vehicle's computer. The cause can range from low oil to mechanical problems or incorrect timing.
Broken or rusted out exhaust system.
if you disconnect the battery for at least 5 minutes then reconnect it ,it will reset the check engine light
After reading the code, and repairing the codes, you reset code with a scan tool.
Check out the related link for instructions on how to change the fuel filter in a 1999 Plymouth Voyager.
If you have a check engine light ON then you need to take it to a repair shop. A defective TPS can cause a hesitation or stall.
Defective computer these vans are known for this
turn the key on and off 3 times and count the check engine flashes
check to see if there was a recall. I have a 1996 Plymouth grand voyager and the garage replaced mine free of charge.
1994 Plymouth voyager does not have an inertia switch , unless you are referring to the airbag switch in which case it is by the bumper reinforcement under the bumper cover , but if you talking about an (inertia) switch for fuel one does not exist on a 94 voyager, your best chance would be to check the fuel pump for voltage, and if none is present check the fuse and fuel pump relay, located in the engine bay fuse block.
The check gauges light comes on when one of the guages is out side of the safe zone. It could be battery voltage, oil pressure, engine temp....
The only ways to improve mileage are to check tire pressures, replace spark plugs, replace air filter, repair any causes for the check engine light to be on.....
Looks like Dorman part #34173. Try their website to double check. www.dormanproducts.com