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eml light with code P20E8

     
Old 08-14-2017, 05:19 PM
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2008 CL63 AMG
eml light with code P20E8
Good evening,

Yesterday morning my eml came on, I read the code P20E8 "reductant pressure too low" the car seemed to be running as normal, I erased the code but then it came back again this morning.

Has anyone any experience with this code or have any suggestions I can try to diagnose before I have to book it in to the dealer.

Many thanks
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Old 09-06-2022, 01:42 PM
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2007 Mercedes E320 BlueTec P1
Originally Posted by dannyfiveforty
Good evening,

Yesterday morning my eml came on, I read the code P20E8 "reductant pressure too low" the car seemed to be running as normal, I erased the code but then it came back again this morning.

Has anyone any experience with this code or have any suggestions I can try to diagnose before I have to book it in to the dealer.

Many thanks
So did you fix it? What was the issue?
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Old 09-06-2022, 02:11 PM
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2008 CL63 AMG
Originally Posted by jessejames4
So did you fix it? What was the issue?
hi, yes I did, it was the pre heater for the ad blue. Was about £200 for a new one if I remember correctly.
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Old 10-23-2023, 03:10 PM
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S class w221
Originally Posted by dannyfiveforty
hi, yes I did, it was the pre heater for the ad blue. Was about £200 for a new one if I remember correctly.
I have this problem too...what is the name of the piece so I can buy it
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