AutoCodes – Ford – B297C Ford

B297C Ford Code - Driver Blend Door Actuator Drive Circuit Open

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: B297C Ford indicates Driver Blend Door Actuator Drive Circuit Open.
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 841

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 B297C 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 B297C Ford - Driver Blend Door Actuator Drive Circuit Open - AutoCodes.com — B297C Ford Code - Driver Blend Door Actuator Drive Circuit Open

What does this mean?

What are the Possible Causes of the DTC B297C 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 B297C 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 B297C 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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Need Help with the Code?

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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 B297C Ford Code

1. What are the common symptoms of OBDII code B297C in a Ford related to the Driver Blend Door Actuator Drive Circuit Open?

The common symptoms include inconsistent temperature control in the vehicle cabin, improper airflow distribution, and potential issues with the heating or cooling system.

2. What are the possible causes of the Driver Blend Door Actuator Drive Circuit Open code B297C in a Ford?

The code B297C can be triggered by a faulty driver blend door actuator, damaged wiring or connectors in the circuit, or a malfunction in the HVAC control module.

3. How can I diagnose the Driver Blend Door Actuator Drive Circuit Open issue in my Ford when the B297C code appears?

Diagnosis typically involves checking the wiring and connectors for any visible damage, testing the blend door actuator for proper function, and using a multimeter to check for continuity in the circuit.

4. Is it safe to continue driving my Ford with the B297C code related to the Driver Blend Door Actuator Drive Circuit Open?

While the vehicle may still be operable with this code, it is recommended to address the issue promptly to avoid potential discomfort due to temperature control problems and prevent further damage to the HVAC system.

5. Can I reset the B297C OBDII code related to the Driver Blend Door Actuator Drive Circuit Open in my Ford without fixing the underlying issue?

Resetting the code without addressing the root cause, such as a malfunctioning blend door actuator or wiring problem, is not recommended as the issue will likely resurface.

6. What are some repair tips for resolving the Driver Blend Door Actuator Drive Circuit Open code B297C in a Ford?

Repair tips include inspecting the blend door actuator for proper operation, repairing or replacing damaged wiring or connectors, and resetting the HVAC control module after fixing the issue.

7. Will fixing the Driver Blend Door Actuator Drive Circuit Open code B297C in my Ford require professional assistance?

While some DIY enthusiasts may be able to address the issue themselves, seeking professional assistance, especially if unfamiliar with HVAC systems, is advisable to ensure proper diagnosis and repair.

8. Are there any preventive measures to avoid encountering the B297C code related to the Driver Blend Door Actuator Drive Circuit Open in my Ford?

Regular maintenance checks on the HVAC system, including inspecting wiring and connectors, can help identify potential issues early and prevent the occurrence of the B297C code.

9. How much can I expect to pay for repairing the Driver Blend Door Actuator Drive Circuit Open code B297C in my Ford at a dealership or auto repair shop?

The cost of repairs can vary depending on the extent of the issue, the need for replacement parts, and labor rates, but it is advisable to obtain quotes from different service providers for comparison.

10. Can the B297C OBDII code related to the Driver Blend Door Actuator Drive Circuit Open in my Ford cause any long-term damage if left unaddressed?

Continued operation with the B297C code unresolved can lead to potential issues with the HVAC system, affecting temperature control and airflow distribution, which may result in discomfort and further damage over time.