replace def heater and still throwing the same code
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New User
Joined: Oct 2017
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talk to a ford dealership parts guy, he said the pressure heater is in the wiring harness which connect to the tank. Is that right? I unplug and look at the wires they all look fine,or is the pressure line heater in the line going to the filter. very new at all of this.
Senior User
Joined: Jun 2012
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My impression is that the line heater is likely wrapped around the DEF line going from the DEF tank to the DEF injector so likely it's replaceable. You could check the resistance of the heater with a tester, the spec is 3 to 5 ohms. If it's out of spec replace it. Ideally you would load test the wiring going to the line heater and then you would know if the wires were good. The amperage draw on the line heater is 2.4 to 4 amps.
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Joined: Nov 2019
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From: TX
P20BA code
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From: Frederick, MD
Posting Guru
Joined: Aug 2007
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From: BA, OK
Hey i know its been a while since you posted this about the heaters on the 6.7 powerstroke, but i have problems with my truck is trowing the P20BA code and i would like to know the normal resistance for the in tank heater before buying it, i already checked the resistance in my truck and it shows me 4.9 ohms
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From: TX
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5th Gear
Joined: Nov 2019
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From: Nova Scotia
My truck is currently showing the following codes
P20B9 = Reductant heater "A" control circuit/open - (the posted video shows me how to check it)
P20BE = Reductant heater "B" control circuit performance
P20BD = Reductant heater "B" control circuit /open - (is the other plug in the video on the top of the def tank the 2nd heater?)
P20E8 = Reductant pressure too low -
these appeared about the same time. Are there other testes I can do to narrow down the trouble or is it likely that the wires have a chafe or break?
only have one vehicle so anything that I take apart, I Have to put back together right away...
thanks
P20B9 = Reductant heater "A" control circuit/open - (the posted video shows me how to check it)
P20BE = Reductant heater "B" control circuit performance
P20BD = Reductant heater "B" control circuit /open - (is the other plug in the video on the top of the def tank the 2nd heater?)
P20E8 = Reductant pressure too low -
these appeared about the same time. Are there other testes I can do to narrow down the trouble or is it likely that the wires have a chafe or break?
only have one vehicle so anything that I take apart, I Have to put back together right away...
thanks
Cargo Master
Joined: Feb 2015
Posts: 2,338
Likes: 255
From: Livermore Ca.
You didn't say what year your truck was and there is a recall on the DEF heater. You need to check with the dealer to see if yours is covered. This is sometimes when a code reader gets in the way of a repair. You are setting multiple codes and the cause may be something up or downstream of the heater.
New User
Joined: Dec 2013
Posts: 4
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From: Bulverde tx
Got the def heater code
I kept getting the def heater code amd would reset it. 2017 with 63,000 miles. I read on here to check the batteries. One battery was 60 percent so i replaced both. 1000 miles later no codes. Thank you for the person who said check the batteries.
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Joined: Dec 2020
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Code P20BA
I was at Idle, and the battery light on, about 2 minutes, then off for about 5 minutes, then on again for about 5 minutes, then off,,
I drove about 2 blocks and the ck engine light came on,, done code ck, P20BA, cleared it and it came back about 50 miles later,, outside temp was 30 and ran as it came back on, 45°
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