Have a serious, hopefully not a serious fix, problem. About a week ago my def fluid meter went to zero, warning light came on, check engine light came on, as well as every time I start truck get X number of miles until truck won't run. Code shows fault in def fluid sensor, says high voltage, sorry can't remember code. Truck has def fluid but gauge on zero. I am assuming it to be a sensor problem but when I look, and have researched for hours, not sure which sensor to replace. On the muffler is 2 sensors I see, one larger on top of muffler that plugs to some electrical box then a plug on other side runs to front of truck, the other is a small sensor on side of muffler that just runs to the front. Any suggestions would be appreciated.
Ram Heavy Duty Forum
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- Thread starter BikerT
- Start date
I’m guessing it is P203D reductant level sensor circuit high. The sensor you’re looking for is for the def level, which is an ultrasonic radar built into the def pump, so it’s not just some separate sensor you buy. This is not something you want to throw parts at because there are a multitude of possible causes for a sensor circuit high voltage fault, most likely wiring. You’re better off just using warranty on this one.
D
Deleted member 80
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Fairly common issue, and parts are scarce. Get it looked at ASAP.
Do you really want your email address plastered on the thread title?