Today, my '14 ED with 85,000 miles threw the P203e "reductant level sensor circuit intermittent/erratic" code. I've done some reading and understand it's most likely related to a sensor in the DEF tank. I have an extended warranty, so I'm wondering if this is something I should look into having fixed. I also have had a GDE tune for over a year now, and I'm thinking about a full delete when the truck is out of warranty. Would that resolve issues with the DEF system? Just looking for some advice. Thanks in advance.