Intake Air temperature sensor 2 - OM651

[Duffie]

Hello All!

First post, long time lurker. Great, and very helpful forum.

Anyways..to the case..

I have a 2009 W212 220 CDI with the OM651 engine.

I have an error code that wont go away, and am researching the cause of this.



My question really is this:

Does my engine have more than one intake air temp sensor? I take it sensor 1 is located around the air intake. Can anyone give me the location of sensor 2?

Thanks alot!

D

 

[mattkh]

I have an error code that wont go away, and am researching the cause of this.

Soooo......... you clear the code using your code reader and then when you use the car, the code comes back.
Have you changed anything..?

 

[Duffie]

Soooo......... you clear the code using your code reader and then when you use the car, the code comes back.
Have you changed anything..?

Hi

Thanks for your reply.

I clear the code, and it comes back once i cycle the ignition.

I just need to find out where this sensor is, so i can start troubleshooting it

 

[mattkh]

Found it.
In the big inlet pipe leading to the air filter.

 

[Duffie]

Found it.
In the big inlet pipe leading to the air filter.

Awesome! And this is sensor 2?

Thanks alot for the help!

 

[mattkh]

Awesome! And this is sensor 2?

Thanks alot for the help!

This is the only intake air temp sensor.
Clean and check the wires and pins on the connector.
Please take a few piccies if possible.

 

[Duffie]

I cant seem to find it.

Theres a map sensor on there(removed on pic) and another sensor thats on the breather pipe From valve cover. No IAT sensor in sight.

 

[mattkh]

I cant seem to find it.

Theres a map sensor on there(removed on pic) and another sensor thats on the breather pipe From valve cover. No IAT sensor in sight.

Thanks.
According to my research, this MAF sensor is not a normal MAF . It incorporates a temperature sensor. It sends a temperature signal to the ECU as well.
Give it a clean with an appropriate spray cleaner and see if the code comes back. How oily does it look inside.?

 

[Duffie]

Pretty good that.. Dont Even think i have to clean it..

 

[mattkh]

Thanks.
I dont have a wiring diagram otherwise we could have checked the connectivity of the cables.
By the way, how many wires can you see.?
Give the connecting pins a clean and check the jaws in the plug, while you have it off.

 

[Duffie]

Yes.. Theyre cleaned and look like theyre brand new.

4 cable on it.

Error still occuring

Thank for you continued help

 

[Duffie]

Managed to find the short.

There is a wire on the left side of the engine. Orange and grey/Black color that had shorted. This wire runs under the a/c pump and towards the front of the engine. I imagine this wire goes to a iat sensor located after the intercooler, but havet checked.

Anyways, code now cleared.

Thank for all the help troubleshooting this.

 

[mattkh]

Managed to find the short.

Well done.
Really grateful to you for the quick responses and the photos.