Code B1B71, evaporator temperature sensor location needed

2014 FORD FUSION

35,500 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC

TONY VILEY

MEMBER
1 POST

I have code B1B71 (Circuit short to battery or Open) for my Evap temperature sensor. Having read around, one of the fixes I understand could be replacing the failed sensor. If I need to replace the Evap Temp Sensor, how do I access the sensor?

Feb 10, 2021 at 7:23 PM

KASEKENNY

✓ASE Certified Mechanic
18,907 POSTS

This could be a sensor issue however, there are other possible causes namely wiring. We need to run through this testing because if you have to replace the sensor then you need to replace the entire HVAC housing as it is not serviced separately.

I attached the testing that we need to run through along with the replacement procedure if it proves to be the sensor.

Let us know what questions you have. Thanks

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Feb 12, 2021 at 4:46 PM

9718030753

MEMBER
1 POST

You do not need to replace the entire HVAC box just because a $20.00 sensor failed.

Aug 10, 2022 at 12:40 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Did you read the #2 note from Ford? They say it is only serviced that way.

Aug 10, 2022 at 12:41 PM