AutoCodes – Mercury – B1691 Mercury

B1691 Mercury Code - Autolamp Delay Circuit Short To Battery

Quick Answer

The Body Control Module (BCM) monitors the Autolamp Delay Circuit. Common causes include Faulty Autolamp Delay Circuit, Faulty Body Control Module (BCM). 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: B1691 Mercury indicates Autolamp Delay Circuit Short To Battery.
Common causes: Common causes include Faulty Autolamp Delay Circuit, Faulty Body Control Module (BCM).
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 572

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1691 Mercury Description

The Body Control Module (BCM) monitors the Autolamp Delay Circuit. The BCM sets the OBDII code when the Autolamp Delay Circuit is not to factory specifications.

OBDII Code B1691 Mercury - Autolamp Delay Circuit Short To Battery - AutoCodes.com — B1691 Mercury Code - Autolamp Delay Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1691 Mercury?

Faulty Autolamp Delay Circuit
Faulty Body Control Module (BCM)

How to Fix the DTC B1691 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 B1691 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 B1691 Mercury Code

1. What are the common symptoms of the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery)?

- Common symptoms include malfunctioning autolamp delay circuit, interior lights staying on or not turning off, and potential draining of the vehicle's battery.

2. What could cause the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery) to trigger?

- The code can be triggered by a short circuit in the autolamp delay circuit, a faulty control module, damaged wiring, or a malfunctioning autolamp sensor.

3. How can I diagnose the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery)?

- Diagnose by inspecting the autolamp delay circuit wiring for shorts or damage, checking the autolamp sensor for proper functioning, and using a diagnostic scanner to read the code.

4. Are there any repair tips for fixing the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery)?

- Repair tips include repairing any damaged wiring in the autolamp delay circuit, replacing a faulty control module if necessary, and ensuring the autolamp sensor is working correctly.

5. Can I drive my vehicle with the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery) active?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential battery drain or other electrical problems.

6. How can I reset the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery) after making repairs?

- Use a diagnostic scanner to clear the code after repairing the autolamp delay circuit short to battery issue. Alternatively, the code may reset automatically after a certain number of driving cycles.

7. Is it possible for the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery) to return after being cleared?

- If the underlying issue causing the code is not properly addressed, it is possible for the code to return. Ensure all repairs have been completed correctly to prevent this.

8. Can a DIY enthusiast fix the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery)?

- Depending on your skill level and access to tools, DIY enthusiasts may be able to diagnose and repair this code by following repair guides and using the necessary equipment.

9. What is the typical cost of repairing the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery) at a mechanic or dealership?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve labor charges for diagnosis and repair, as well as the cost of any replacement parts needed.

10. Are there any recalls or service bulletins related to the OBDII code B1691 Mercury (Autolamp Delay Circuit Short To Battery)?

- Checking with the manufacturer or authorized dealerships for any recalls or service bulletins related to this specific OBDII code is recommended to stay informed about potential known issues and solutions.