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Engine-Codes – Mercury – B117C Mercury

B117C Mercury Code - Latch Centering Switch Invalid

Quick Answer

The B117C diagnostic trouble code for Mercury vehicles indicates that the latch centering switch is invalid. Common causes include Faulty latch centering switch, Wiring issues or electrical connection problems, Corrosion or debris interfering with the switch. 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
B117C Mercury indicates Latch Centering Switch Invalid.
Common causes
Common causes include Faulty latch centering switch, Wiring issues or electrical connection problems, Corrosion or debris interfering with the switch.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 19, 2024
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Code B117C Mercury Description

The B117C diagnostic trouble code for Mercury vehicles indicates that the latch centering switch is invalid. This switch is a component of the vehicle's latch system, which is responsible for securing the doors and ensuring they are properly closed. When the centering switch is deemed invalid, it means that the system is unable to accurately detect the position of the latch, potentially leading to issues with door closure and security.

OBDII Code B117C Mercury - Latch Centering Switch Invalid
B117C Mercury Code - Latch Centering Switch Invalid

Common Causes of B117C Mercury

  1. Faulty latch centering switch
  2. Wiring issues or electrical connection problems
  3. Corrosion or debris interfering with the switch
  4. Impact or damage to the latch system
  5. Software or programming issues related to the switch calibration

Symptoms of B117C Mercury

  1. Doors not closing properly or requiring multiple attempts to latch
  2. Door ajar warning light on the dashboard
  3. Difficulty locking or unlocking doors remotely
  4. Audible clicking or grinding noises when attempting to close doors

How to Fix B117C Mercury

  1. Begin by diagnosing the specific cause of the invalid latch centering switch, using a diagnostic scanner to retrieve the trouble codes and pinpoint the issue.
  2. Inspect the latch centering switch and surrounding components for any visible damage, corrosion, or debris that may be affecting its operation.
  3. Test the switch's functionality by manually operating the latch and observing the switch's response.
  4. Replace the faulty latch centering switch if necessary, ensuring that the new component is properly calibrated and installed.
  5. Clear the trouble codes from the vehicle's system and perform a final test to confirm that the issue has been resolved.

Cost to Fix B117C Mercury

The typical repair costs for addressing a B117C code related to an invalid latch centering switch can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing the latch centering switch and addressing any associated wiring or connection issues may range from $150 to $400, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local providers for a more accurate estimate based on your vehicle make and model.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B117C Mercury Code

1. What does the OBDII code B117C Mercury mean?

The code B117C for Mercury vehicles refers to the Latch Centering Switch Invalid error.

2. What are common symptoms of the B117C code in a Mercury vehicle?

Common symptoms of the B117C code may include issues with the door latch mechanism, difficulty closing the door properly, or interior lights staying on when the door is closed.

3. What causes the B117C error code in a Mercury vehicle?

The B117C code is typically triggered when there is an issue with the centering switch in the door latch mechanism, such as a faulty switch or misalignment.

4. How can I diagnose the B117C code in my Mercury vehicle?

Diagnosing the B117C code usually involves inspecting the door latch mechanism, checking the centering switch for proper function, and testing the electrical connections related to the switch.

5. Can I repair the B117C code in my Mercury vehicle myself?

Repairing the B117C code may require adjusting or replacing the centering switch in the door latch mechanism. This repair can be done by a skilled DIYer or a professional mechanic.

6. Are there any safety concerns associated with the B117C code in a Mercury vehicle?

While the B117C code itself may not pose immediate safety risks, it is important to address the issue promptly to ensure proper functioning of the door latch mechanism for passenger safety.

7. Will the B117C code cause my Mercury vehicle to fail an emissions test?

The B117C code is not directly related to emissions control, so it is unlikely to cause your Mercury vehicle to fail an emissions test.

8. How much does it typically cost to repair the B117C code in a Mercury vehicle?

The cost of repairing the B117C code in a Mercury vehicle can vary depending on the specific cause of the issue and whether you choose to do the repair yourself or take it to a mechanic.

9. Can the B117C code in a Mercury vehicle cause other electrical problems?

While the B117C code is specifically related to the door latch centering switch, it is possible that underlying electrical issues could cause additional problems in the vehicle's electrical system.

10. Is it safe to continue driving my Mercury vehicle with the B117C error code present?

It is generally not recommended to drive your Mercury vehicle with the B117C code present, as it can affect the proper operation of the door latch mechanism and compromise passenger safety.

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