Hi all, I’ve just completed an oil and filter change on my 2013 focus 1.6 tdci (titanium). All went as normal but on starting the car the outside temperature sensor has constantly read -40. Ran it for around 6-10 mins to see if it adjusted.

I've tried removing a number of fuses, the block connector to the passenger mirror and lastly the positive battery connection in an effort to reset it. 

none have worked so looking for a tip/advice

many thanks

Matt

6 hours ago, Trcek said:

Hi all, I’ve just completed an oil and filter change on my 2013 focus 1.6 tdci (titanium). All went as normal but on starting the car the outside temperature sensor has constantly read -40. Ran it for around 6-10 mins to see if it adjusted.

I've tried removing a number of fuses, the block connector to the passenger mirror and lastly the positive battery connection in an effort to reset it. 

none have worked so looking for a tip/advice

many thanks

Matt

Hi Mat, 

Don't worry about it. It happened to me as well. It was again after an oil and filter change. I though that I had unplugged or broken some sensor or cable but after a short run the reading was absolutely fine. Some months after I decided to check my ECU for DTC and then I found out that a DTC have been stored probably back then. 

I'm sure that it will be fine. 

BR

The outside temp sensor is located in the n/s door mirror so I can't see there is a link with oil and filter change . 

You've probably knocked the plug out for either the engine temp sensor or the MAF sensor.  Both of these make the outside temp default to -40...  I have no idea why but they do!

My temperature is playing up the reading is saying 3 degrees it tends to go down again can this be fixed 

On 08/01/2019 at 1:51 PM, Trcek said:

Hi all, I’ve just completed an oil and filter change on my 2013 focus 1.6 tdci (titanium). All went as normal but on starting the car the outside temperature sensor has constantly read -40. Ran it for around 6-10 mins to see if it adjusted.

I've tried removing a number of fuses, the block connector to the passenger mirror and lastly the positive battery connection in an effort to reset it. 

none have worked so looking for a tip/advice

many thanks

Matt

Hi,

Did you get a solution for this. Mine has just done the same after an oil and filter change

Ferdinand

Hi, 

Mine has been acting up lately too - it's reading about 6-15°C higher than the actual temperature outside, but very occasionally works correctly. 

 

Any ideas on what the issue might be or how best to fix this issue? 

 

Thanks

21 hours ago, Ferdinand said:

Hi,

Did you get a solution for this. Mine has just done the same after an oil and filter change

Ferdinand

Had my car serviced new years eve and had the same problem.

I ended up driving for around 20/30 mins and it rectified itself slowly as I drove