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Code 123900 09 gl 320 blutec runs ok for couple minuets then…

Customer Question
Code 123900 09 gl...

Code 123900 09 gl 320 blutec runs ok for couple minuets then no power will not rev over 2800 think it might be intake runner motor

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

Once it looses power then stays powerless

Mechanic's Assistant: Are you fixing your GL yourself? What have you tried so far?

Shop we changed the oil cooler seals car left came back two days later

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Egr working fine pressure sensor seems ok have autologic

Submitted: 8 months ago.Category: Mercedes
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Answered in 23 minutes by:
12/5/2017
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 6,268
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
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Hello, my name is***** and i will do my best to assist you.I am going over your story now and will reply back soon with some info,thanks!

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

for the charge pressure too low code, you will need to check for air intake leaks from the turbo to the intercooler to the intake.

the code will set if there is a loss of pressure.

best give aways are oil leaks, that will show where air is leaking out.

the code sets when there is a differance too great with pressure sensors for the intake.

the system knows how much pressure should be at certain rpms.

once there is a pressure loss of like 1 pound i think it is then the code will set and limp mode will take over.

hope this helps.

please let me know if you end up needing more help.

Please take a second and click the stars at the top of the screen to rate my service so I may be paid for my assistance.5 stars is ideal :) . Please save me as a favorite and request me in the future.Keep in mind that when you rate it does not end our conversation, all it does is pay me for my help. You can still return here to me for follow up information if needed just simply reply back, thanks!
Lou P.
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Customer reply replied 8 months ago
Smoked tested no leaks found could it be the runner motor
Customer reply replied 8 months ago
Car has good power for a few minuets
Customer reply replied 8 months ago
What should that pressure read read on my Autologic
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

if it was the inlet port shutoff motor there would be codes for it.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

this can also be the motor on the side of the turbo but usually it sets a code as well,

take off the intake and check to see how much play the turbo has.

i do not know the pressures the scanner should see, the computer is way too smart to know what pressure should be seen at what rpm, and we dont have that info in writing.

and a smoke machine puts out little pressure compared to turbo boost.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

have you made any progress on this issue? are you still needing help?

please let me know,

Lou

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