AutoCodes – Mercury – B2718 Mercury

B2718 Mercury Code - Liftgate/Decklid Ajar Output Short To Battery

Quick Answer

The Liftgate/Trunk Module (LTM) monitors the Liftgate/Decklid Ajar Switch. Common causes include Faulty Liftgate/Decklid Ajar Switch, Liftgate/Decklid Ajar Switch harness is open or shorted, Liftgate/Decklid Ajar 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
B2718 Mercury indicates Liftgate/Decklid Ajar Output Short To Battery.
Common causes
Common causes include Faulty Liftgate/Decklid Ajar Switch, Liftgate/Decklid Ajar Switch harness is open or shorted, Liftgate/Decklid Ajar 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.
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Code Popularity 584
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 26, 2020
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Code B2718 Mercury Description

The Liftgate/Trunk Module (LTM) monitors the Liftgate/Decklid Ajar Switch. The LTM sets the OBDII code when the LTM detects a short to voltage from the liftgate ajar circuit to the Body Control Module (BCM).
OBDII Code B2718 Mercury - Liftgate/Decklid Ajar Output Short To Battery - AutoCodes.com
B2718 Mercury Code - Liftgate/Decklid Ajar Output Short To Battery

What are the Possible Causes of the DTC B2718 Mercury?

  • Faulty Liftgate/Decklid Ajar Switch
  • Liftgate/Decklid Ajar Switch harness is open or shorted
  • Liftgate/Decklid Ajar Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B2718 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 B2718 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 B2718 Mercury Code

1. What does OBDII code B2718 mean for a Mercury vehicle?

B2718 indicates a Liftgate/Decklid Ajar Output Short To Battery, meaning there is an electrical issue in the circuit responsible for detecting if the liftgate or decklid is open.

2. What are the common symptoms of a B2718 code?

Symptoms may include the liftgate ajar warning light staying on, difficulty locking the liftgate, or intermittent issues with the power liftgate operation.

3. What causes the B2718 code to appear?

The code is typically caused by a short circuit to the battery in the liftgate ajar sensor wiring, a faulty liftgate ajar switch, or damaged wiring harnesses.

4. Can a faulty liftgate ajar switch trigger the B2718 code?

Yes, a malfunctioning liftgate ajar switch can fail to properly detect the liftgate's position and trigger this error code.

5. How do I diagnose the B2718 code?

Start by inspecting the wiring and connectors for damage or corrosion near the liftgate. Use a multimeter to check for continuity and shorts in the circuit.

6. Is it safe to drive with the B2718 code?

While it may not affect drivability, the code could prevent the liftgate from locking properly, posing a security risk or causing further electrical issues.

7. How can I fix the B2718 code?

Repairs may involve replacing damaged wiring, repairing connectors, or replacing a faulty liftgate ajar switch.

8. How much does it cost to fix the B2718 code?

Costs vary depending on the issue but can range from $50 for simple wiring repairs to $200+ if the switch or additional components need replacement.

9. Can clearing the B2718 code with a scanner fix the issue permanently?

No, clearing the code without addressing the underlying cause will only temporarily erase it, and it will likely return.

10. What tools are needed to fix the B2718 code?

Tools typically include a multimeter, a diagnostic scanner, and basic hand tools for removing panels and accessing wiring.

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