B105A Mercury Code - Cabin Temperature Sensor Fan Circuit Short
Quick Answer
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. Common causes include Faulty Cabin Temperature Sensor Fan, Cabin Temperature Sensor Fan harness is open or shorted, Cabin Temperature Sensor Fan circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B105A Mercury indicates Cabin Temperature Sensor Fan Circuit Short.
- Common causes
- Common causes include Faulty Cabin Temperature Sensor Fan, Cabin Temperature Sensor Fan harness is open or shorted, Cabin Temperature Sensor Fan circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B105A Mercury Description
What are the Possible Causes of the DTC B105A Mercury?
- Faulty Cabin Temperature Sensor Fan
- Cabin Temperature Sensor Fan harness is open or shorted
- Cabin Temperature Sensor Fan circuit poor electrical connection
How to Fix the DTC B105A Mercury?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B105A:14 Cabin Temperature Sensor Fan Circuit Short To Ground or Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B105A Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B105A Mercury Code
1. What are the common symptoms of OBDII code B105A in a Mercury related to the Cabin Temperature Sensor Fan Circuit Short?
- The common symptoms include the cabin temperature sensor fan not functioning properly, inconsistent air conditioning performance, and potential issues with climate control.
2. What can cause the OBDII code B105A related to the Cabin Temperature Sensor Fan Circuit Short in a Mercury?
- The code B105A can be triggered by a short circuit in the cabin temperature sensor fan circuit, faulty wiring, a malfunctioning cabin temperature sensor, or a problem with the climate control module.
3. How can I diagnose the OBDII code B105A in my Mercury for the Cabin Temperature Sensor Fan Circuit Short?
- To diagnose the issue, you can use an OBDII scanner to retrieve the specific error code, visually inspect the wiring and connections related to the cabin temperature sensor fan, and test the sensor itself for proper functionality.
4. Is it safe to continue driving my Mercury with the OBDII code B105A related to the Cabin Temperature Sensor Fan Circuit Short?
- It is generally not recommended to drive the vehicle with unresolved electrical issues like a cabin temperature sensor fan circuit short, as it can affect the performance of the climate control system and potentially lead to other problems.
5. How can I repair the OBDII code B105A Cabin Temperature Sensor Fan Circuit Short in my Mercury?
- The repair process may involve fixing the short circuit in the wiring, replacing a faulty cabin temperature sensor, repairing or replacing damaged connectors, or resetting the climate control module.
6. Can a DIY enthusiast fix the OBDII code B105A related to the Cabin Temperature Sensor Fan Circuit Short in a Mercury?
- Depending on their skill level and access to tools, a DIY enthusiast may be able to address simpler issues like checking and repairing wiring connections, but more complex repairs involving sensor replacement or module resetting may require professional assistance.
7. Will resetting the OBDII code B105A related to the Cabin Temperature Sensor Fan Circuit Short in my Mercury make it go away permanently?
- Resetting the code may clear it temporarily, but if the underlying issue causing the code is not addressed and fixed, the code is likely to reappear once the system detects the problem again.
8. How much can I expect to pay for repairing the OBDII code B105A in a Mercury due to the Cabin Temperature Sensor Fan Circuit Short?
- Repair costs can vary depending on the root cause of the issue, the extent of the damage, and labor rates in your area. It's advisable to consult a mechanic or dealership for an accurate estimate.
9. Are there any preventive maintenance steps I can take to avoid encountering the OBDII code B105A related to the Cabin Temperature Sensor Fan Circuit Short in my Mercury?
- Regularly checking the climate control system, addressing any unusual symptoms promptly, and maintaining proper care of the cabin temperature sensor and fan components can help prevent issues that lead to this error code.
10. Can the OBDII code B105A in a Mercury related to the Cabin Temperature Sensor Fan Circuit Short affect the overall performance of the vehicle?
- While the code specifically relates to the cabin temperature sensor fan circuit, unresolved issues with the climate control system can impact comfort, air quality, and potentially the overall driving experience in the vehicle.
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