i thought thats for the truck to recognize a fob with a dead batter, so it will still start

 

Can anyone tell me what to do about my wiper fluid not pumping up. I also would like to say that my check engine light comes on once I get down to half of a tank. Once I fill it up, it goes off. This is on my 2019 F150 4x4. Ford's computer says its my catalytic converter.

 

This isn't a Hint, Tip or Trick. Best to search for similar threads, or start your own thread so as not to derail or clutter this thread.

Are you sure it's your check engine light or just the low washer fluid light coming on?

It's 2 separate issues, the check engine has nothing to do with your wiper fluid. Wiper fluid should be fairly easy to diagnose: check all the fluid lines for blockages, does the pump turn on?

 

For the washer pump it's likely the pump but there's a couple basic checks to do before calling it. First check the fuse that runs that circuit, If the fuse is good then you need to find the connector on the pump located at the bottom of the fluid tank (you can follow the washer fluid hose down to find it), unplug it and test for power with a meter or test light while you have an assistant activate the washer.(keep in mind this will not load test the circuit but will give you good direction where to go next). If you have power there you can feel confident replacing the pump. For the money light without hands on diagnostics we're all just guessing but it could be as simple as a venting issue with the solenoid or tank vent/cap. Have you tried when the light comes on removing the gas cap and reinstalling it to see if the light goes out? If it does this would indicate a venting problem.

 

I don't have a fuel cap, just the flap. Thanks for the suggestions.

 

It's both.

 

Delete please