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DEF and P203D code

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Old Jun 5, 2017 | 11:57 AM
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DEF and P203D code

I got a warning that my DEF was low less than 2 weeks ago, at around 650+ still left, I got the P203D code. I pulled into O'Reilly's, got the DEF. Had them clear the code. So far, have added 2.5 gallons DEF but need to add the 2nd still.


Is it pure coincidence that it threw the P203D code while my tank was low and now that I've added DEF, it'll be OK? Or am I looking at a repair? From what I've read online, the sensor is not covered under warranty....what the heck did I pay $1,800 for if this stuff isn't covered?!
 
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Old Jun 5, 2017 | 06:31 PM
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do a complete fill of DEF then monitor. It is easy for the system to get confused.


Run it down to<200 to empty then do a complete refill.
 
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Old Jun 6, 2017 | 01:07 PM
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Originally Posted by senix
do a complete fill of DEF then monitor. It is easy for the system to get confused.


Run it down to<200 to empty then do a complete refill.

Thanks. I'm going to go ahead and top it off as I should be able to get most of the 2nd 2.5 gallons in there.
 
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