AutoCodes – Ford – B297B Ford

B297B Ford Code - Blend Door Actuator Drive Circuit Shorted To Ground

Quick Answer

Under normal operation, to rotate the blend door actuator clockwise, the Electronic Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module supplies voltage to the blend door actuator motors through the door actuator feed A circuits and supplies ground through the door actuator feed B circuits. Common causes include Stuck or damaged linkage or door, Faulty Blend Door Actuator, Blend Door Actuator harness is open or shorted. 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: B297B Ford indicates Blend Door Actuator Drive Circuit Shorted To Ground.
Common causes: Common causes include Stuck or damaged linkage or door, Faulty Blend Door Actuator, Blend Door Actuator harness is open or shorted.
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 849

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 Mar 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B297B Ford Description

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

OBDII Code B297B Ford - Blend Door Actuator Drive Circuit Shorted To Ground - AutoCodes.com — B297B Ford Code - Blend Door Actuator Drive Circuit Shorted To Ground

What does this mean?

What are the Possible Causes of the DTC B297B Ford?

Stuck or damaged linkage or door
Faulty Blend Door Actuator
Blend Door Actuator harness is open or shorted
Blend Door Actuator circuit poor electrical connection
Electronic Manual Temperature Control (EMTC) Module
Electronic Automatic Temperature Control (EATC) Module

How to Fix the DTC B297B Ford?

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 B297B Ford 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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Get the B297B Ford 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 B297B Ford Code

1. What are the common symptoms of OBDII code B297B in a Ford related to the Blend Door Actuator Drive Circuit Shorted To Ground?

The common symptoms include issues with temperature control, such as the inability to adjust the climate settings or inconsistent airflow from the vents.

2. What are the possible causes of OBDII code B297B in a Ford indicating a Blend Door Actuator Drive Circuit Shorted To Ground?

Possible causes include a faulty blend door actuator, damaged wiring or connectors in the circuit, a short to ground in the electrical system, or a malfunctioning HVAC control module.

3. How can I diagnose OBDII code B297B in a Ford for a Blend Door Actuator Drive Circuit Shorted To Ground?

Diagnosis typically involves using a scan tool to retrieve the trouble code, inspecting the blend door actuator and its connections, checking for damaged wiring, and testing the circuit for shorts to ground.

4. What are the repair options for addressing OBDII code B297B in a Ford related to the Blend Door Actuator Drive Circuit Shorted To Ground?

Repair options may include replacing the faulty blend door actuator, repairing damaged wiring or connectors, addressing any shorts to ground in the circuit, or reprogramming the HVAC control module.

5. Can I drive my Ford with OBDII code B297B indicating a Blend Door Actuator Drive Circuit Shorted To Ground?

It is not recommended to drive your Ford with this code unresolved, as it can lead to discomfort due to inconsistent temperature control and may affect the overall functionality of the HVAC system.

6. How urgent is it to fix OBDII code B297B related to a Blend Door Actuator Drive Circuit Shorted To Ground in a Ford?

While it may not cause immediate safety concerns, addressing this code promptly is advisable to restore proper climate control functionality and prevent potential further damage to the HVAC system.

7. Will resetting the OBDII code B297B in a Ford resolve the issue with the Blend Door Actuator Drive Circuit Shorted To Ground?

Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code. Proper diagnosis and repair are necessary to resolve the issue effectively.

8. Can a DIY enthusiast fix OBDII code B297B in a Ford related to a Blend Door Actuator Drive Circuit Shorted To Ground?

Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address this code by following repair guides and steps for diagnosing and fixing the blend door actuator circuit issue.

9. How much does it typically cost to repair OBDII code B297B for a Blend Door Actuator Drive Circuit Shorted To Ground in a Ford?

The cost of repair can vary based on the specific cause of the issue, the parts needed for replacement, and whether professional labor is required. It is recommended to obtain quotes from mechanics or repair shops for an accurate estimate.

10. Is OBDII code B297B related to a Blend Door Actuator Drive Circuit Shorted To Ground a common issue in Ford vehicles?

This code can be a common issue in Ford vehicles, particularly those with climate control systems that utilize blend door actuators. Regular maintenance and timely repairs can help prevent this problem from occurring.