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2009 Freightliner M2 106 - VIN 1FVACWDT69HAC8857 CEL - ECU…

Customer Question
2009 Freightliner M2 106 -...
2009 Freightliner M2 106 - VIN 1FVACWDT69HAC8857
CEL - ECU 128 P1d 111 Fail 01
Range InhibitAny idea where to start ?
This truck has had a history of multiple "yellow smoke" lights a day - recently. (Hot exhaust fumes)
We just fixed and turbo clamp seal issue - and a DPF T-stat sensor.
These frequent cycles of HEA (yellow smoke light), have been more and more frequent and we can't seem to put our finger on it. We DID change the DPF on this truck over a year ago (approx. 20-30k miles ago).Last major service was exhaust manifold gasket and manifold replacement.Truck ran great after it.Insights ...Thank you in advance !
Submitted: 1 year ago.Category: Medium and Heavy Trucks
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Answered in 9 minutes by:
4/30/2021
Technician: RichardH416, Resident Tech replied 1 year ago
RichardH416
RichardH416, Resident Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 200
Experience: Expert
Verified

Hi and welcome to Just Answer. Ill assist you with the code.

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Customer reply replied 1 year ago
thank you
Technician: RichardH416, Resident Tech replied 1 year ago

The 111 code is for the coolant level sensor. Make sure the coolant is full and the sensor is plugged in. If that looks good, you can ohm the sensor out. It should be around 800k ohms when tank is full. If it's out of range, replace the sensor. It is in the degas bottle/ overflow tank. The yellow light means it needs a regen. If this is happening multiple times daily, I would check the differential pressure sensors at the DPF first. If they are good, you may have an exhaust leak, wiring issue, etc. It is best to hook to a laptop for diagnostics as it will quickly point you in the right direction.

And you are welcome!

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Customer reply replied 1 year ago
we already hooked the computer to it before and got no codeswhy do you think we are having the HEST light lights up about 3 times daily ?
we check the exhaust and there are no leaks
Technician: RichardH416, Resident Tech replied 1 year ago

The coolant level sensor may be inhibiting the regen. Does it seem like it does a complete regen when the light comes on?

Anything over 800k ohms means the sensor is bad.

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Customer reply replied 1 year ago
when the light comes on, it stays on for about 20-30mins at highway speedprobably does a full regen
Technician: RichardH416, Resident Tech replied 1 year ago

The diff pressure sensors monitor incoming and outgoing exhaust pressure at DPF. They are what signal the regen if difference is past the threshold.

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Customer reply replied 1 year ago
did you mean DPF Pressure sensor? Do you have a part number ?
Technician: RichardH416, Resident Tech replied 1 year ago

I won't be at my shop until this afternoon to look up part numbers. Yes it is the pressure sensor on DPF.

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Customer reply replied 1 year ago
DPF diff pressure sensor - looking it up now. Thank you!
Technician: RichardH416, Resident Tech replied 1 year ago

You are welcome sir!

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Technician: RichardH416, Resident Tech replied 1 year ago

Good evening. Just checking up on any progress.  I will look for your reply. Thank you.

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Customer reply replied 1 year ago
replaced DPF dif pressure sensor and DPF gaskets. Re-sealed it; ran it. truck is running poor, wavering up and down in rpm. (in idle) With a constant whistle marking up and down from the turbo. Not sure as to why this is happening ... Needless to say, we've been running a rental.Any insight ?
Technician: RichardH416, Resident Tech replied 1 year ago

It sounds like an Air leak with the turbo doing that. Can you double check the clamps on the exhaust system?

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Technician: RichardH416, Resident Tech replied 1 year ago

Hi. Just checking in on any progress. I'll look for your reply. Thank you.

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Customer reply replied 1 year ago
Still running re-gens on auto pilot - amber smoke on dash coming on about 3 times a day... this is frustrating. We did not find any air leaks ... Truck headed to Freightliner TUE. Any other advices ???
Technician: RichardH416, Resident Tech replied 1 year ago

Do you still have the code coming up?

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RichardH416, Resident Tech
Category: Medium and Heavy Trucks
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