Jerry,
The P1491 code is not related to any emissions control systems.
It is a trouble code for the radiator fan control relay circuit.
Maybe there are some other codes stored in your computer.
If you are having any overheating issues especially at idle or stop and go driving I would check to make sure you have power to the radiator fan relay by testing the plug that goes to it. When the engine is at operating temperature insert a test light into the plug going to the relay to see if you have power there. If you do the problem is more than likely a bad relay. Leave the light there for a little bit though as the power will not be sent there if the engine isn't hot enough yet. This relay is located on the drivers side underneath the van. You will see the wires going to the fan.
Saturday, May 23rd, 2020 AT 11:54 AM
(Merged)