p20e9 reductant pressure too high

[cnapierala]

Sunday morning i drove to church and on the way the truck went into a regen. I drove past the church and let the regen complete, SL was at 8% and regen was complete, even gave it some time to cool down before shutting her down. Turbo outlet temps were in the mid 300f. Note that temps that morning were very cold, as cold as -11F in one area i drove through on the way there.
Got in the Jeep to leave (temps were at that time were around 10F) and after only a few miles i got the error message. Read the code when i got home and it was " p20e9 reductant pressure too high".

From what im reading this could be a bad sensor, kinked line, clogged injector or maybe something frozen somewhere. Wondering if anyone else has seen this error?

I cleared the code and will drive it to town later today and am planning to put in some rislone DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner or a jug of Platinum blue def to see if that does anything. Really hoping to avoid a trip to the dealer.

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[BDinTX]

My guess would be clogged injector but with those temps I guess it could be frozen. Hopefully it's a transient issue or the rislone does the trick. Good luck, keep us posted.

 

[cnapierala]

My guess would be clogged injector but with those temps I guess it could be frozen. Hopefully it's a transient issue or the rislone does the trick. Good luck, keep us posted.

Thanks and will do. I dont expect to get much help here solving the issue but figured id document it in case anyone else had the error.

 

[cnapierala]

For reference in case anyone stumbles on this thread - Code was cleared, check engine light was off when i left yesterday. I got the DEF system error message at startup and then it went right away. Im pretty convinced that this was just an issue of cold temps but put in a container of Platinum Blue DEF to help clean it out just in case. Decided to skip the Rislone for now unless the message comes on again.

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