Engine-Codes - Mercury - B105A Mercury

B105A Mercury Code - Cabin Temperature Sensor Fan Circuit Short

- Code Popularity: 720 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B105A Mercury?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Cabin Temperature Sensor Fan
  • Cabin Temperature Sensor Fan harness is open or shorted
  • Cabin Temperature Sensor Fan circuit poor electrical connection

Code Tech Notes

B105A:12 Cabin Temperature Sensor Fan Circuit Short To Battery
B105A:14 Cabin Temperature Sensor Fan Circuit Short To Ground or Open

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How to Fix the DTC B105A Mercury?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B105A Mercury code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B105A Mercury Code Mean?

The in-vehicle temperature and humidity sensor contain a thermistor and a sensing element which separately measures the in-vehicle air temperature and the humidity, then sends those readings to the FCIM. The in-vehicle temperature and humidity sensor has an electric fan within the sensor that draws in-vehicle air across the two sensing elements. The FCIM may adjust the actuator doors based on the in-vehicle temperature and humidity sensor information to maintain the desired humidity and temperature of the passenger cabin air. The Front Controls Interface Module (FCIM) monitors the Cabin Temperature Sensor Fan. The FCIM sets the OBDII code when the Cabin Temperature Sensor Fan is not to factory specifications.

B105A Mercury Code - Cabin Temperature Sensor Fan Circuit Short

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