Check engine light, code P21B0 what is it?
New User
Joined: Jan 2019
Posts: 1
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P21B0 CEL
Just got mine checked out at Auto Zone and P21B0 popped up on the diagnostic computer. They couldn't tell me what it meant or was. Can anyone give me some advice. It's a 2014 F 250 FX4 6.7 with about 42,000 miles. Any help would be greatly appreciated.
Senior User
Joined: Jun 2010
Posts: 161
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DEF sensor/heater. Ford covered r/r cost.
Posting Guru
Joined: Aug 2007
Posts: 1,902
Likes: 26
From: BA, OK
https://www.ford-trucks.com/forums/1...l#post15402162
Link to the part in question.
https://parts.autonationfordwhitebea...-l?parent=1173
7th Gear
Joined: Sep 2019
Posts: 7
Likes: 0
Hello, I had error code P21B0 on my 2016 Ford F250. I saw all the threads on it above. However, I keep seeing something about deleting codes? I'm interested in removing the whole Def thing, but don't know where to start.
Laughing Gas
Joined: Nov 2016
Posts: 892
Likes: 244
From: NWPA
The DEF delete and codes are two different but connected animals. I took my truck to a shop to have the delete work done and a old man (stock) tune added. This was about $2K or less. But this was after much dealer work to try to get the truck to run well and not want to regen all the time. The codes dont show up now. and in my case the truck runs MUCH better. I am not recommending this delete as a cure all but in my case it came down to the only option, if I was going to keep the truck.
Regards,
Chris
Regards,
Chris
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Fomhoire
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