AutoCodes – Lincoln – B1086 Lincoln

B1086 Lincoln Code - Air Distribution Damper Motor Circuit

Quick Answer

To rotate the defrost/panel/floor mode door actuator, the Heating, Ventilation, and Air Conditioning (HVAC) Module supplies voltage and ground to the defrost/panel/floor mode door actuator motor through the actuator motor circuits. Common causes include Faulty Air Distribution Damper Motor, Air Distribution Damper Motor harness is open or shorted, Air Distribution Damper Motor circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B1086 Lincoln indicates Air Distribution Damper Motor Circuit.
Common causes: Common causes include Faulty Air Distribution Damper Motor, Air Distribution Damper Motor harness is open or shorted, Air Distribution Damper Motor circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 2,094

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1086 Lincoln Description

To rotate the defrost/panel/floor mode door actuator, the Heating, Ventilation, and Air Conditioning (HVAC) Module supplies voltage and ground to the defrost/panel/floor mode door actuator motor through the actuator motor circuits. To reverse the defrost/panel/floor mode door actuator rotation, the HVAC module reverses the voltage and ground circuits.
The defrost/panel/floor mode door actuator feedback resistor is supplied a 5-volt reference voltage and ground from the HVAC module. The HVAC module measures the resistance on the defrost/panel/floor mode door actuator feedback circuit to determine the defrost/panel/floor mode door actuator position by the position of the actuator feedback resistor wiper arm.
During an actuator calibration cycle, the HVAC module drives the defrost/panel/floor mode door until the door reaches both internal stops in the HVAC case. If the defrost/panel/floor mode door is temporarily obstructed or binding during a calibration cycle, the HVAC module may interpret this as the actual end of travel for the door. When this condition occurs and the HVAC module commands the actuator to its end of travel, the airflow may not be from the expected outlets.

OBDII Code B1086 Lincoln - Air Distribution Damper Motor Circuit - AutoCodes.com — B1086 Lincoln Code - Air Distribution Damper Motor Circuit

What does this mean?

What are the Possible Causes of the DTC B1086 Lincoln?

Faulty Air Distribution Damper Motor
Air Distribution Damper Motor harness is open or shorted
Air Distribution Damper Motor circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Module

How to Fix the DTC B1086 Lincoln?

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 does this mean?

Code Tech Notes

B1086:11 - Air Distribution Damper Motor: Circuit Short to Ground
B1086:12 - Air Distribution Damper Motor: Circuit Short to Battery
B1086:13 - Air Distribution Damper Motor: Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1086 Lincoln 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 B1086 Lincoln Code

1. What are the common symptoms of OBDII code B1086 in a Lincoln related to the Air Distribution Damper Motor Circuit?

- Common symptoms include issues with the air distribution system, such as inconsistent airflow from the vents, the inability to switch between different airflow modes, or the air only coming out of specific vents.

2. What are the potential causes of OBDII code B1086 in a Lincoln related to the Air Distribution Damper Motor Circuit?

- The code B1086 usually indicates a fault with the air distribution damper motor circuit, which can be caused by a malfunctioning damper motor, damaged wiring harness, or a faulty control module.

3. How can I diagnose the OBDII code B1086 in my Lincoln related to the Air Distribution Damper Motor Circuit?

- Diagnosing the code typically involves using a scan tool to retrieve the specific fault code and then inspecting the damper motor, checking the wiring for any damage, and testing the control module for proper functionality.

4. Can I still drive my Lincoln with OBDII code B1086 related to the Air Distribution Damper Motor Circuit?

- While it may be possible to drive the vehicle with this code present, it is not recommended as it can lead to discomfort due to issues with the air distribution system. It is best to address the problem promptly.

5. What are some repair tips for fixing OBDII code B1086 in a Lincoln related to the Air Distribution Damper Motor Circuit?

- Repair tips may include checking and replacing the damper motor if it's faulty, repairing any damaged wiring, and resetting the control module after fixing the issue to clear the fault code.

6. Is it possible to reset the OBDII code B1086 related to the Air Distribution Damper Motor Circuit without making any repairs?

- While clearing the fault code without addressing the underlying issue may temporarily turn off the warning light, the problem will likely persist and trigger the code again until the root cause is fixed.

7. Can extreme weather conditions affect the occurrence of OBDII code B1086 in a Lincoln related to the Air Distribution Damper Motor Circuit?

- Yes, extreme temperatures or humidity levels can sometimes exacerbate issues with the air distribution system, potentially leading to malfunctions in the damper motor circuit and triggering the B1086 code.

8. Are there any preventive maintenance steps to avoid OBDII code B1086 related to the Air Distribution Damper Motor Circuit in a Lincoln?

- Regularly inspecting the air distribution system, ensuring proper airflow, and addressing any unusual noises or inconsistencies promptly can help prevent issues that may trigger the B1086 code.

9. How long does it typically take to repair OBDII code B1086 in a Lincoln related to the Air Distribution Damper Motor Circuit?

- The repair time can vary depending on the exact cause of the issue and the complexity of accessing and replacing components. In general, it may take a couple of hours to a full day for diagnosis and repair.

10. Should I attempt to fix OBDII code B1086 related to the Air Distribution Damper Motor Circuit in my Lincoln myself, or is it better to seek professional help?

- While some DIY enthusiasts may be able to diagnose and fix the issue themselves, it is recommended to seek professional help, especially if you are not familiar with automotive electrical systems, to ensure the problem is correctly identified and resolved.