B1C37 Mercury Code - Master Lock Switch
Quick Answer
The Body Control Module (BCM) monitors the Master Lock Switch. Common causes include Faulty Master Lock Switch, Master Lock Switch harness is open or shorted, Master Lock Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B1C37 Mercury indicates Master Lock Switch.
- Common causes
- Common causes include Faulty Master Lock Switch, Master Lock Switch harness is open or shorted, Master Lock Switch circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B1C37 Mercury Description
What are the Possible Causes of the DTC B1C37 Mercury?
- Faulty Master Lock Switch
- Master Lock Switch harness is open or shorted
- Master Lock Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1C37 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
B1C37:23 Master Lock Switch Signal Stuck Low
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1C37 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 B1C37 Mercury Code
1. What does the OBDII code B1C37 mean for a Mercury vehicle?
The B1C37 code indicates a malfunction in the master lock switch circuit, which controls the vehicle's power door locks.
2. What are common symptoms of the B1C37 code in a Mercury?
Symptoms include unresponsive door lock switches, inability to lock or unlock doors using the master control, or intermittent operation of the power door locks.
3. What causes the B1C37 code to appear?
Common causes include a faulty master lock switch, damaged wiring or connectors in the circuit, or an issue with the body control module (BCM).
4. Can a blown fuse cause the B1C37 code?
Yes, a blown fuse in the power door lock circuit can cause this code, as it interrupts the electrical flow to the master lock switch.
5. How can I diagnose the B1C37 code on my Mercury?
Check the wiring and connectors for damage, test the master lock switch for continuity, and inspect related fuses. Use a scan tool to verify if the BCM is functioning properly.
6. Is the B1C37 code specific to Mercury vehicles?
While the code is common in Mercury vehicles, it may also apply to other Ford-related brands, as they share similar systems.
7. How do I fix the B1C37 code?
Repairs may involve replacing the master lock switch, repairing damaged wiring, or replacing a blown fuse. In rare cases, reprogramming or replacing the BCM may be necessary.
8. Can I still drive my vehicle with the B1C37 code?
Yes, the vehicle is drivable, but you may experience inconvenience with the power door locks not functioning correctly.
9. How much does it cost to repair the B1C37 code?
Repair costs vary but typically range from $50 to $200, depending on whether the issue is a simple wiring fix or a switch replacement.
10. Will clearing the B1C37 code with a scan tool fix the problem?
Clearing the code may temporarily remove it, but if the underlying issue is not addressed, the code will likely return.
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