M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Ml320 CDI Limp Mode Help!

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Old Dec 6, 2024 | 11:38 PM
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2008 s63
Ml320 CDI Limp Mode Help!

Hello all I have a 2008 Ml320 cdi with 100k miles. Long story short it went into limp mode once on me last winter. Replaced sensor A 006 153 95 28 with oem sensor and a new fuel filter and it was an immediate fix. Drove another 5k miles and limp mode is back won’t rev past 3k rpm and no turbo whatsoever. Got code P0069. Replaced both sensors with OEM Bosch sensors (0261230193). Also replaced the same A 006 153 95 28 sensor again as well as the intake manifold air temperature sensor (651153002828) still absolutely nothing changed and still have P0069. Anyone have any ideas?!
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Old Dec 7, 2024 | 12:41 AM
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2017 GLS 450,Bmw Z4 35i
try smoke test
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Old Dec 7, 2024 | 03:25 AM
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Originally Posted by Aammggg
Hello all I have a 2008 Ml320 cdi with 100k miles. Long story short it went into limp mode once on me last winter. Replaced sensor A 006 153 95 28 with oem sensor and a new fuel filter and it was an immediate fix. Drove another 5k miles and limp mode is back won’t rev past 3k rpm and no turbo whatsoever. Got code P0069. Replaced both sensors with OEM Bosch sensors (0261230193). Also replaced the same A 006 153 95 28 sensor again as well as the intake manifold air temperature sensor (651153002828) still absolutely nothing changed and still have P0069. Anyone have any ideas?!
The intercooler hoses can be easily inspected for oil traces/air leakage.

Also it may be a good idea to use a better scanner as p0069 is far to generic to make you spend more time.
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Old Dec 8, 2024 | 01:48 PM
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ML320 CDI
Jeez, it could be a whole bunch of things if you are only able to pull the generic codes. I have a 2007 ML 320 CDI with over 200,000 miles. I bought it for less than $7500 and put about 1,000 miles a week on it.I think I have replaced just about every common sensor chasing some of these codes as I usually try to fix things in my driveway. Knock on wood, mine has been behaving for the better part of the last 50,000 miles. I would check for air leaks associated with the MAF horn that feeds the turbo. It is common to have small leaks with the air intake cause a LHM condition. One time with mine the plastic engine cover wore a hole in the top part of the horn and that was enough to put the car in Limp mode. I remember once towing a trailer back from Indianapolis, about 1000 miles, needing to clear limp mode with my reader after losing boost and thinking I split an intercooler hose but in actuality, the car puked out the MAP temperature sensor which I could have fixed with a zip tie had I known. For a while, I was having issues with the pressure sensor just after the turbo getting carboned up that would throw me in LHM but that’s not happened for a year or so. I have a Foxwell NT530 scanner which has been pretty good but even that has limitations.
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Old Dec 9, 2024 | 01:50 PM
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2008 ML320 CDI
Have you already had the intake flap motor issue? Very common on this vehicle.
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Old Dec 10, 2024 | 04:30 PM
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Specific codes

Check the component 'B17/8 (Charge air temperature sensor)'. The signal voltage is too high.

Check the component 'B5/1 (Charge pressure sensor)'. The atmospheric pressure between the components 'B5/1

(Charge pressure sensor)' and 'N3/9

(Common-rail Diesel Injection (CDI) control module)' is implausible.
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