Sorry it took so long for me to get back to this discussion,I have been super busy,and we had our 13yr dog get sick and pass away within 3 days,last week.
My error code P20E9 Reductant pressure to high.
With the error message I got about the reductant pressure to high I did not get any other error.
I verified the error code I got and checked with my own OBDII reader before I took my Jeep to the dealer and when I called the dealer them what I found they then they told me not to clear the code that they needed to see the codes them self before they would do the PCM reflash.
Mine was repaired so far with no more problems after getting the PCM re flash that Willis posted early in this discussion.
I will report if I experience any more problems.
All of these problems being reported here are very similar to problems I had with 12 2500 Ram Cummins.
The problems are all from the EPA crap forced to be attached to ALL new Diesels.
Our fearless leader Obama is punishing the USA with his political agenda,the USA already has the most stringent AIR pollution laws in the world!!
China makes more air pollution in 1 day than the USA makes in 1 year.
ON EDIT: Let the USA alone (NO MORE REGULATION) let the rest of the world catch up to our standards before the govenment impose more on the USA
The EPA is one those government agency's gone to abuse of power!
Where was the EPA BEFORE THE GULF OIL SPILL,as we now know there were numerous safety violations before the spill, the oil companies did not have the proper spill containment in place before the spill which they were require by law to have in place before they started to drill. There were hundreds of EPA violations which the oil companies never got 1 fine.
It seems Obama will do most anything to to force his so called "green energy policy" on the USA.
In case you did not know Obama paid 3 times the cost of diesel fuel for fuel for our NAVY grown from algae than to buy DIESEL fuel for our navy.
I did not intend to make this political but it all relates to why we have all the crap attached to our diesel vehicles finally making it to the USA that Europe and other countries have had for years without all the crap attached to them.
I have an office in Germany and own a VW TDI
passat wagon there,it easily gets 45 MPG + while running 120 mph + down the autobahn. My wife has a 13 VW Jetta TDI
here in the USA that gets 42 mpg local driving and 50mpg on the hwy.
We also own a 1984 Mercedes 190D here in the USA with 170k on the clock with absolutely no air pollution crap and gets 30mpg city and 40mpg hwy.
Good luck to all having these problems.