AutoCodes – Lincoln – B2956 Lincoln

B2956 Lincoln Code - Blend Door Close Circuit Failure Or Short

Quick Answer

Under normal operation, to rotate the mode door actuator clockwise, the Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module supplies voltage to the Blend, Floor/Defrost and Panel mode door actuator motors through the door actuator feed B circuits, and supplies ground through the door actuator feed A circuits. Common causes include Faulty Blend Door Actuator Motor, Blend Door Actuator Motor harness is open or shorted, Blend Door Actuator Motor 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: B2956 Lincoln indicates Blend Door Close Circuit Failure Or Short.
Common causes: Common causes include Faulty Blend Door Actuator Motor, Blend Door Actuator Motor harness is open or shorted, Blend Door Actuator Motor 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 431

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 Feb 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2956 Lincoln Description

Under normal operation, to rotate the mode door actuator clockwise, the Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module supplies voltage to the Blend, Floor/Defrost and Panel mode door actuator motors through the door actuator feed B circuits, and supplies ground through the door actuator feed A circuits. To rotate the mode door actuator counterclockwise, the EMTC module or EATC module reverses the voltage and ground circuits.
The mode door actuator feedback resistors are supplied a ground from the EMTC module or EATC module by the mode door actuator return circuits and a 5-volt reference voltage on the mode door actuator reference circuits. The EMTC module or EATC module reads the voltage on the mode door actuator feedback circuits to determine the mode door actuator position by the position of the actuator feedback resistor wiper arm.

OBDII Code B2956 Lincoln - Blend Door Close Circuit Failure Or Short - AutoCodes.com — B2956 Lincoln Code - Blend Door Close Circuit Failure Or Short

What does this mean?

What are the Possible Causes of the DTC B2956 Lincoln?

Faulty Blend Door Actuator Motor
Blend Door Actuator Motor harness is open or shorted
Blend Door Actuator Motor circuit poor electrical connection
Faulty Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module

How to Fix the DTC B2956 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2956 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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Need Help with the Code?

Get the B2956 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 B2956 Lincoln Code

1. What are the common symptoms of OBDII code B2956 in a Lincoln related to Blend Door Close Circuit Failure Or Short?

The common symptoms include inconsistent or inadequate heating or cooling inside the vehicle, inability to adjust the temperature settings, or unusual clicking or knocking sounds coming from the HVAC system.

2. What are the possible causes of OBDII code B2956 in a Lincoln?

The code B2956 in a Lincoln can be triggered by issues such as a malfunctioning blend door actuator, damaged wiring or connectors in the blend door circuit, or a faulty HVAC control module.

3. How can I diagnose the Blend Door Close Circuit Failure Or Short issue in my Lincoln?

To diagnose the issue, you can use an OBDII scanner to retrieve the specific trouble code B2956. Additionally, visually inspect the blend door actuator, check the wiring and connectors for any visible damage, and perform a thorough HVAC system test.

4. Is it safe to continue driving my Lincoln with OBDII code B2956 related to Blend Door Close Circuit Failure Or Short?

While it may be possible to drive the vehicle with this code present, it is not recommended as it can lead to further damage to the HVAC system and compromise the comfort levels inside the vehicle.

5. How can I repair OBDII code B2956 in my Lincoln caused by Blend Door Close Circuit Failure Or Short?

Repairing the issue may involve replacing the faulty blend door actuator, repairing or replacing damaged wiring or connectors, or reprogramming the HVAC control module. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Can a DIY enthusiast fix OBDII code B2956 related to Blend Door Close Circuit Failure Or Short in a Lincoln?

While some DIY enthusiasts may be able to address this issue, it is recommended to have a professional mechanic diagnose and repair the problem to ensure proper resolution and prevent any further complications.

7. Are there any preventive measures to avoid encountering OBDII code B2956 in a Lincoln?

Regularly maintaining the HVAC system, checking for any unusual noises or temperature fluctuations, and addressing any issues promptly can help prevent the occurrence of code B2956 related to Blend Door Close Circuit Failure Or Short.

8. How much does it typically cost to repair OBDII code B2956 in a Lincoln caused by Blend Door Close Circuit Failure Or Short?

The cost of repairing this issue can vary depending on the specific cause of the problem, the extent of the damage, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics for an accurate estimate.

9. Can OBDII code B2956 in a Lincoln related to Blend Door Close Circuit Failure Or Short affect fuel efficiency?

While the code itself may not directly impact fuel efficiency, prolonged driving with HVAC system issues can lead to increased strain on the vehicle's components, potentially affecting overall performance and fuel efficiency.

10. How urgent is it to address OBDII code B2956 in a Lincoln due to Blend Door Close Circuit Failure Or Short?

It is recommended to address the issue promptly to avoid further damage to the HVAC system and ensure optimal comfort levels inside the vehicle. Ignoring the problem can lead to more costly repairs in the future.