Temperature sensor upstream of turbo sensor 22A5-007

[chrismun2019]

Hi I am looking for some help really I have recently been struggling with power loss in my car at first it was abit sluggish now sometimes I struggle to get over 60 and then sometimes this is ok again anyway I have taking this to a mercedes specialist and they are saying it in the upstream of turbo sensor and also my car needs updating to the latest software I would like to no if anybody else has had this problem also is this a job I could do my self also if I replace the sensor would this need a software update for the new sensor to take effect also if anybody would no how to get to the sensor taking the air filter box out etc That would be great thankyou very much

 

[Dean Fletcher]

Hi Chris and welcome,
Getting to the sensor properly wouldn't be that bad as long as you can get safely get under the car. The main issue would be getting the updated software without this the eml would probably keep coming back on. I had issues with mine giving off different temps between the two sensors. I think your car has been going in and out of limp mode. Does it only do this from cold?

 

[chrismun2019]

Hi thankyou very much for your reply I am getting 2 different opinions one garage is saying it will need the software update for the sensor to take affect the other is saying no it won’t and also I have heard this sensor can only be changed from the top of the engine this is under the air filter box what I don’t no how to remove and yes it seems a lot worse in the morning when cold thankyou

 

[Dean Fletcher]

Hi thankyou very much for your reply I am getting 2 different opinions one garage is saying it will need the software update for the sensor to take affect the other is saying no it won’t and also I have heard this sensor can only be changed from the top of the engine this is under the air filter box what I don’t no how to remove and yes it seems a lot worse in the morning when cold thankyou

Yours will be slightly different to mine I'd imagine. I'd say you would need the software update if there is one. The sensors themselves are about £75 and should only really be an hours labour to sort Inc the update. The o2 sensors can handle a temp difference of around 50 degrees once they go out this range limp mode and the eml light will come on. I found with mine is when cold I'd start it up leave it a minute or 2 then off then back on this would get it out of limp mode it just the initial cold start I'd didn't like.