Ambient air temperature sensor location and removal instructions needed

Tiny
CARYN HORTON
  • MEMBER
  • 2015 CHRYSLER 200
  • 3.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 121,000 MILES
Radiator was replaced and since A/C not working and check engine light is on. Ran codes and don't remember the number but it had something to do with that sensor. We have a very slow leak somewhere. We always smell antifreeze. We changed the thermostat and still smell antifreeze. Any suggestions where is most likely? It has never overheated. We just have to add antifreeze every few days. Not a lot, but we shouldn't have to add any. Other than these issues everything else is fine.
Thank you so much.
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Tuesday, March 19th, 2019 AT 6:11 AM

4 Replies

Tiny
JOETECHPRO
  • EXPERT
Hey CARYN HORTON,

The ambient air temperature sensor is located as shown in the picture attached.
It looks like you will have to remove the front grill which is attached to the front bumper trim.

Did you replace the radiator your self?

The A/C not working and the coolant leak may be separate issues or related.

The first and quickest thing to do with the air conditioning be to check if with the air conditioning switched on that the compressor clutch is engaging, this will cycle on and off in normal operation.

You will have to visually check for coolant leaks, you should be able to see crystallized coolant residue if you are losing coolant that fast.

Can you please check codes and list all the codes you have.

If you delete these codes do they return?

Regards, Joe
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Tuesday, March 19th, 2019 AT 12:47 PM
Tiny
CARYN HORTON
  • MEMBER
I think code is u110e and yes it returns and is the only code. Does the entire bumper have to be removed?
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Tuesday, March 19th, 2019 AT 5:01 PM
Tiny
JOETECHPRO
  • EXPERT
Hey CARYN HORTON,

From what i can see yes you will need to remove the whole front bumper.

I will add the instructions below.

I have also found a video which runs through it and will give you an idea if you feel comfortable tackling the job. It also shows how to release the bumper around the headlight which is the only tricky part.

https://www.youtube.com/watch?v=VmYbDNNvSbc

I will also give instructions in the next message on checking the wiring for the sensor which you could also do to rule that out before replacing the sensor. The sensor should be fairly inexpensive so it is up to you whether or not to go down this route or just changing the sensor out first.

You will then need to delete the codes and retest.

Regards, Joe
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Wednesday, March 20th, 2019 AT 8:48 AM
Tiny
JOETECHPRO
  • EXPERT
Hey CARYN HORTON,

As I said in my previous message if you would like to check the wiring for this sensor the instructions are below.

You will need a multi-meter to perform these tests.

Disconnect battery negative cable
Disconnect the ambient air temp sensor (after bumper removal)
Access and unbolt body control module (fuse panel underneath drivers side dash)
Disconnect connector C6 shown in second picture.

Check continuity from ambient air sensor connector plug to body control module plug for the two wires shown in wiring diagram below.

Also with both plugs disconnected check resistance between each pin of the ambient air temp sensor and a know good ground. Then switch multi-meter to voltage and do the same check. This ensures you don't have any shorts to ground/positive.

As you can see this is fairly involved and in the interest of time you may choose just to replace the sensor and see how you go.

Don't hesitate if you have any further questions.

Regards, Joe
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Wednesday, March 20th, 2019 AT 9:07 AM

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