AutoCodes – Mercury – B1328 Mercury

B1328 Mercury Code - Passenger Door Ajar Circuit Open

Quick Answer

The Smart Junction Box (SJB) sends a voltage signal to the door ajar switches. Common causes include Faulty Passenger Door Ajar Switch, Passenger Door Ajar Switch harness is open or shorted, Passenger Door Ajar Switch 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
B1328 Mercury indicates Passenger Door Ajar Circuit Open.
Common causes
Common causes include Faulty Passenger Door Ajar Switch, Passenger Door Ajar Switch harness is open or shorted, Passenger Door Ajar Switch 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 805
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 29, 2024
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Code B1328 Mercury Description

The Smart Junction Box (SJB) sends a voltage signal to the door ajar switches. The door ajar switch is closed with the door closed. When the door is opened, the signal to ground is interrupted indicating an open door to the SJB. The Diagnostic Trouble Code (DTC) sets when the SJB detects an open from the RH front door ajar input circuit.
OBDII Code B1328 Mercury - Passenger Door Ajar Circuit Open - AutoCodes.com
B1328 Mercury Code - Passenger Door Ajar Circuit Open

What are the Possible Causes of the DTC B1328 Mercury?

  • Faulty Passenger Door Ajar Switch
  • Passenger Door Ajar Switch harness is open or shorted
  • Passenger Door Ajar Switch circuit poor electrical connection
  • Faulty Smart Junction Box (SJB)

How to Fix the DTC B1328 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 B1328 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 B1328 Mercury Code

1. What are the common symptoms of OBDII code B1328 Mercury - Passenger Door Ajar Circuit Open?

Symptoms may include the interior lights staying on, the door ajar warning light constantly illuminated, and potential issues with power door locks.

2. What are some possible causes of the B1328 code indicating a Passenger Door Ajar Circuit Open in a Mercury vehicle?

Causes may include a faulty door ajar switch, damaged wiring in the door harness, or a malfunctioning body control module.

3. How can I diagnose the issue related to the B1328 code in my Mercury for the passenger door ajar circuit being open?

You can start by visually inspecting the door ajar switch and its wiring, checking for any physical damage or corrosion. Using a multimeter to test continuity in the circuit can also help pinpoint the issue.

4. Are there any simple repair tips for addressing the B1328 code in a Mercury due to the passenger door ajar circuit being open?

To resolve this issue, you may need to replace the faulty door ajar switch, repair damaged wiring, or reprogram the body control module if necessary.

5. Can the B1328 code in a Mercury be cleared/reset, or does it require immediate repair?

While you can clear the code temporarily using an OBDII scanner, it is advisable to address the underlying issue causing the code to prevent potential safety hazards and further electrical problems.

6. Is it safe to continue driving my Mercury with the B1328 code indicating a Passenger Door Ajar Circuit Open?

It is generally not recommended to drive the vehicle with this issue, as it may lead to battery drain, electrical malfunctions, or even a potential security risk if the door fails to lock properly.

7. How much does it typically cost to repair the B1328 code related to the passenger door ajar circuit being open in a Mercury?

Repair costs can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor at a dealership or auto repair shop.

8. Can I fix the B1328 code in my Mercury on my own, or should I seek professional help?

If you have experience with automotive electrical systems and the necessary tools, you may attempt to diagnose and fix the issue yourself. However, seeking professional help is recommended if you are unsure or unfamiliar with the repair process.

9. Will the B1328 code in my Mercury reset on its own after the issue is fixed, or do I need to clear it manually?

Once the underlying problem causing the code is resolved, the code may clear itself after a certain number of drive cycles. However, you can use an OBDII scanner to manually clear it for immediate confirmation.

10. Are there any preventive measures I can take to avoid encountering the B1328 code for the passenger door ajar circuit open in my Mercury in the future?

Regularly inspecting and maintaining the door ajar switches, keeping the door seals clean and lubricated, and addressing any minor electrical issues promptly can help prevent the recurrence of this code.

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