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sprinkles08, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 23113
Experience:  ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
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I just replaced the amble tank heater assembly and i still

Customer Question

i just replaced the amble tank heater assembly and i still get the p20 be and pd codes?
JA: Have you checked the coolant level? Has there been any leaking from the hoses?
Customer: no leaks but i have not checked the coolant level. why would that give those codes
JA: What is the model/year of your Mercedes?
Customer: 2011 2500
JA: Are you fixing your 2500 yourself? What have you tried so far?
Customer: yes i am. I just started with the def heater
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 year ago.
Category: Mercedes
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

I'm assuming this is a sprinter. If you're setting a heater code after the heater was replaced then a wiring issue is likely.

Were fault codes cleared after the repair and they returned after driving it?

What are the actual P code numbers that are currently setting? The codes will start with a P and have four digits.