AutoCodesMercury – C1A96 Mercury

C1A96 Mercury Code - Brake Light Signal Stuck High

Quick Answer

The Body Control Module (BCM) monitors the Brake Light. Common causes include Faulty Brake Light, Brake Light harness is open or shorted, Brake Light 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
C1A96 Mercury indicates Brake Light Signal Stuck High.
Common causes
Common causes include Faulty Brake Light, Brake Light harness is open or shorted, Brake Light 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 730
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Feb 23, 2019
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Code C1A96 Mercury Description

The Body Control Module (BCM) monitors the Brake Light. The BCM sets the OBDII code when the Brake Light is not to factory specifications.
OBDII Code C1A96 Mercury - Brake Light Signal Stuck High - AutoCodes.com
C1A96 Mercury Code - Brake Light Signal Stuck High

What are the Possible Causes of the DTC C1A96 Mercury?

  • Faulty Brake Light
  • Brake Light harness is open or shorted
  • Brake Light circuit poor electrical connection
  • Faulty Stop Lamp Switch
  • Faulty Body Control Module (BCM)

How to Fix the DTC C1A96 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1A96 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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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 C1A96 Mercury Code

1. What does OBDII code C1A96 mean on a Mercury vehicle?

C1A96 indicates that the brake light signal is stuck in a high (on) position, meaning the system detects the brake pedal is continuously engaged even when it’s not.

2. What are the common symptoms of code C1A96 in a Mercury vehicle?

Symptoms may include the brake lights staying on, cruise control not working, or a warning light on the dashboard.

3. What causes the C1A96 code to appear in a Mercury?

The most common causes are a faulty brake light switch, damaged wiring or connectors, or a malfunction in the brake pedal assembly.

4. Can a faulty brake light switch trigger code C1A96?

Yes, a defective or misaligned brake light switch is a primary cause of this code.

5. How do I diagnose the C1A96 code on a Mercury?

Check the brake light switch for proper operation, inspect the wiring and connectors for damage, and confirm the brake lights are functioning correctly.

6. Can I keep driving with a C1A96 code on my Mercury?

It’s not recommended, as the stuck brake light signal can affect critical systems like cruise control and confuse drivers behind you.

7. How do I fix the C1A96 code on a Mercury?

Repair or replace the brake light switch, ensure the wiring is intact, and verify the brake pedal sensor is functioning properly.

8. How much does it cost to repair a C1A96 code on a Mercury?

Fixing this issue typically costs $50–$200, depending on whether the brake light switch or wiring needs to be repaired or replaced.

9. Can a blown fuse cause the C1A96 code?

No, this code specifically relates to the brake light signal being stuck high, not a loss of power.

10. Will clearing the C1A96 code fix the problem?

No, clearing the code without addressing the root cause will only temporarily remove the warning, and the issue will likely return.

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