Turbo actuator arm not moving

isohail72

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Hi Guys, Turbo actuator arm is not moving, cleaned DPF. Getting these codes.
Any advice would be appreciated.
Thanks in advance
 

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OneForTheRoad

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Can you get live data on the temperature reading ?
 
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isohail72

isohail72

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OneForTheRoad

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Looks like the set point is 224 degrees . Yours is saying 352. And most likely put the car into limp mode. Hence why the actuator isn't moving.
 
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mersum1es

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Try unplugging it, it should show constant (I cant recall for sure, SDS will tell, but I would say -40C)
 

mersum1es

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Umm.. did they test actuator? Did they check temperature sensor readings and DPF dp sensor and check DPF parameters?

In theory all those faults can be related, and thats bold statement to say 'it's turbo'... and in addition if you have an injector which p*ss too much fuel to cylinder, you *might* get something like that behavior... TRUE that actuator is quite common fault, but I am concerned about those temperatures (if they are real).

Fault codes alone are not '10 Commandments' even read by SDS, each of those codes would give guided test procedure, and most of those components have individual test.

IF it is turbo actuator, go to some diesel/turbo expert and get actuator only. If that garage has proper equipments, they can test it on bench. On same time they can test you injectors too, if needed.
 
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isohail72

isohail72

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Umm.. did they test actuator? Did they check temperature sensor readings and DPF dp sensor and check DPF parameters?

In theory all those faults can be related, and thats bold statement to say 'it's turbo'... and in addition if you have an injector which p*ss too much fuel to cylinder, you *might* get something like that behavior... TRUE that actuator is quite common fault, but I am concerned about those temperatures (if they are real).

Fault codes alone are not '10 Commandments' even read by SDS, each of those codes would give guided test procedure, and most of those components have individual test.

IF it is turbo actuator, go to some diesel/turbo expert and get actuator only. If that garage has proper equipments, they can test it on bench. On same time they can test you injectors too, if needed.
They didn't check anything in detail, just a diagnostic.
 

DrFeelgood

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I was talking with my mechanic about these turbo problems last week.
He reckons that there’s a reason that the turbo has gone, something to do with oil heating up too much and clogging pipes like arteries so you replace the turbo and a few thousand miles later it goes again.
 

OneForTheRoad

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I have ordered sensor from merc, will get Thursday morning.
Have that fitted , clear fault codes. Check it again with live data.... even a gearbox fault will engage safe mode and stop the actuator arm moving.... what then ? Fit a new turbo.... clueless......
 
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isohail72

isohail72

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Have that fitted , clear fault codes. Check it again with live data.... even a gearbox fault will engage safe mode and stop the actuator arm moving.... what then ? Fit a new turbo.... clueless......
Its so confusing. To be honest. It was a DELANY MOTORS, STOCKPORT. they are an independent Mercedes service. But did do any investigation . Just digonistic. Charged £60
 

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