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Old 09-08-2022, 08:46 AM   #1
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Mass Air Flow Fault??

I'm in my RV on the start of a 3-week trip. On Day 1 problems begin, took Sprinter to MB dealership in Columbus, GA. Here's the Tech's Report:

"Check Engine light on, caused by MAF sensor CEL fault (P150100). Tech inspected and scanned via SDS, CEL for MAF, stated “Malfunction”. No issues with fuses, voltage between leg 1 & 2 good. Swapped with other known good part, failure persists. Tested continuity from CDI engine harness section to MAF connector, NO continuity. Break in the line suspected at the z-slice in front of turbo."

Tech says vehicle will run, how long? Who knows?*

Since he could not fix it, I'm back on the road. Any advice on repairs or how long it may run with this fault?
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Old 11-07-2022, 08:29 AM   #2
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fwiw...
We also had a MAF Sensor code on ours. The mechanic tried to clean the MAF sensor with "Sensor Clean" spray and told us that the code went away.

We drove away and within minutes the Check-Engine light came back on.
I purchased the same product and cleaned it again thoroughly myself. No go. The Check Engine light came back on.

Not thinking that the mechanic would not have checked the air filter as it would've been the most obvious thing to do, I used a bit of...er... logic...ie..."Air-flow" and decided to take apart the air filter housing and air filter.

Big mouse nest in the plastic pipe just before the air filter. Cleaned it all out. Fashioned a metal grill to place in the crimped part of the plastic intake pipe. MAF Sensor code gone & no more mouse nests.
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Old 11-07-2022, 01:31 PM   #3
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Quote:
Originally Posted by 88keys View Post
fwiw...
We also had a MAF Sensor code on ours. The mechanic tried to clean the MAF sensor with "Sensor Clean" spray and told us that the code went away.

We drove away and within minutes the Check-Engine light came back on.
I purchased the same product and cleaned it again thoroughly myself. No go. The Check Engine light came back on.

Not thinking that the mechanic would not have checked the air filter as it would've been the most obvious thing to do, I used a bit of...er... logic...ie..."Air-flow" and decided to take apart the air filter housing and air filter.

Big mouse nest in the plastic pipe just before the air filter. Cleaned it all out. Fashioned a metal grill to place in the crimped part of the plastic intake pipe. MAF Sensor code gone & no more mouse nests.
My CEL saga started on 9/7/22 and has not ended yet. After leaving the Columbus, GA MB dealership I drove about 3500 miles. Most of the time the CEL and/or Wheel Speed (ABS, Collision, No Cruise Control) related lights were illuminated. When I returned to my home base and took the Sprinter into the Mobile, AL MB dealership for service. They replaced the wheel sensor at No Charge (Warranty) and the CEL went out. No mice nest in my air intake, not even an MAF issue as I was led to believe.

I'm still trying to get my $400 diagnostics charge in Columbus, GA refunded under the BlueTec extended warranty language. Wish me luck!
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