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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > P20BD code-reductant code?
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      01-10-2019, 05:06 PM   #1
mitchtr25068@aol.com
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P20BD code-reductant code?

On my 2014 328d, I’ve had check engine light on for weeks, and code reader says

P20BD
Reductant heater b
Control circuit/open
Permanent

Any thoughts on why/where/how and what to fix? I’ve never heard of a reductant heater and haven’t located it yet in my Bentley book. Thanks!
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      01-10-2019, 05:15 PM   #2
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See if you can get a code read with a tool that reads BMW manufacturer codes. P codes can be vague and sometimes misleading. Sometimes there are 2-3 detailed manufacturer codes to a single P code.
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-2014 328d Wagon, self-tuned, 245hp/400ft-lbs.
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      01-10-2019, 07:39 PM   #3
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I do not have a 328d but I have a 335d. For the 335d it is either the AdBlue heater or the temperature sensor in the SCR tank (AdBlue)
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      Yesterday, 08:54 AM   #4
mitchtr25068@aol.com
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I did more research on the code and found a company called xemodex in Canada that makes a urea heater and sensor repair kit, with the option to have them rebuild the system or do it yourself with a very detailed 30-plus page guide. Iíve got it in order and will report back

https://xemodex.com/us/product/def-s...-bmw-3-series/
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      Yesterday, 08:07 PM   #5
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Did you check with them if it applies to the F30 chassis?
All those pics look like it's for the E90 335d.
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