Code P20B8...again?
03-30-2017, 04:05 PM
#1
Junior Member
Thread Starter
Code P20B8...again?
So I purchased my 2012 R350 in August with a check engine light on (MB Dealer auction with 68,000 kms) When I got it my dealer told me it was the buletec heater. I changed that and was good for about 3 month, then another check engine light. This time is was P20B8 and was told by Mercedes that it was now the bluetec pump. So I had it changed (not from MB) and 1 month later same code? What could this be? I am stumped and so is the guy who replaced both Heater and pump. Any suggestions.
Thanks
Thanks
12-10-2017, 09:39 PM
#3
Junior Member
Thread Starter
Sorry to bump and old thread, but the code came back! I have changed the bluetec heather and pump, so what is left!!! So frustrating that I can't fix this problem. Any suggestions?
Thanks
Thanks
01-17-2018, 03:18 AM
#4
Hey, did you ever get this figured out? My 2012 R350 BT is doing the same thing all of the sudden. The AdBlue warning is on; countdown of starts initiated. I took it to the dealership today, and they looked like a deer in the headlights! They made an appointment for later, because "this is never simple". Yikes...get me out of this Mercedes!
03-10-2018, 08:40 PM
#6
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Audi A8
Have one in the shop with limit counter at 0 starts remaining. Can’t reset counter with scanner. Module seems to be in a locked mode . Adblue problem . As soon as i find out what the fix is for this 2112 R350, i will post it. If anyone has questions or needs advice i will be happy to assist anyone who needs help. And if anyone has any info on my problem send info. Thanks
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03-23-2018, 11:57 PM
#8
MBWorld Fanatic!
You might have better luck posting in the gl x164 forum or even the diesel forum.
Cheers and best of luck
Cheers and best of luck
03-24-2018, 10:30 AM
#9
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2009 Mercedes Benz GL 320 Bluetec
Rattlebox
Have you changed the ad blue level sensor? and did you use a MB heating element when you changed the heater in the tank?
I replaced my heater level sensor and pump. I used an XEmodex heating element system and it has worked flawlessly. I did it myself at my Independant repair shop I own and operate and it took about 3hrs total including answering the telephone 14 fricking times.......
I replaced my heater level sensor and pump. I used an XEmodex heating element system and it has worked flawlessly. I did it myself at my Independant repair shop I own and operate and it took about 3hrs total including answering the telephone 14 fricking times.......
Last edited by Rattlebox; 03-24-2018 at 10:33 AM. Reason: additional info
03-24-2018, 07:35 PM
#10
Junior Member
Thread Starter
I dont know. I will ask the mechanic who performed the job. Funny enough the light went off this morning, so I will wait until ot comes back on. Thats whats making me think it might be an electrical issue.
