AutoCodes – Ford – B1966 Ford

B1966 Ford Code - A/C Post Heater Sensor Circuit Failure

Quick Answer

The Dual Automatic Temperature Control (DATC) Module monitors the A/C Post Heater Sensor. Common causes include Faulty A/C Post Heater Sensor, A/C Post Heater Sensor harness is open or shorted, A/C Post Heater Sensor 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
B1966 Ford indicates A/C Post Heater Sensor Circuit Failure.
Common causes
Common causes include Faulty A/C Post Heater Sensor, A/C Post Heater Sensor harness is open or shorted, A/C Post Heater Sensor 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 854
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 31, 2019
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Code B1966 Ford Description

The Dual Automatic Temperature Control (DATC) Module monitors the A/C Post Heater Sensor. The DATC sets the OBDII code when the A/C Post Heater Sensor is not to factory specifications.
OBDII Code B1966 Ford - A/C Post Heater Sensor Circuit Failure - AutoCodes.com
B1966 Ford Code - A/C Post Heater Sensor Circuit Failure

What are the Possible Causes of the DTC B1966 Ford?

  • Faulty A/C Post Heater Sensor
  • A/C Post Heater Sensor harness is open or shorted
  • A/C Post Heater Sensor circuit poor electrical connection
  • Faulty Dual Automatic Temperature Control (DATC) Module

How to Fix the DTC B1966 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 B1966 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.

Need more information about the B1966 Ford code?

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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 B1966 Ford Code

1. What are the common symptoms of OBDII code B1966 Ford (A/C Post Heater Sensor Circuit Failure)?

- Common symptoms include a malfunctioning heater system, inconsistent air conditioning performance, and possible illumination of the check engine light.

2. What can cause the OBDII code B1966 Ford to trigger?

- The code B1966 Ford can be triggered by issues such as a faulty post heater sensor, damaged wiring or connectors, or a malfunctioning control module.

3. How can I diagnose the A/C Post Heater Sensor Circuit Failure related to code B1966 in a Ford vehicle?

- Diagnosis involves using an OBDII scanner to retrieve the specific code, inspecting the post heater sensor and its circuit for any damage, and checking the wiring connections for continuity.

4. What are some possible repair tips for addressing the A/C Post Heater Sensor Circuit Failure code B1966 in a Ford?

- Repair tips may include replacing the faulty post heater sensor, repairing any damaged wiring or connectors, and resetting the fault code using an OBDII scanner.

5. Is it safe to continue driving my Ford vehicle with the OBDII code B1966 related to A/C Post Heater Sensor Circuit Failure?

- It is recommended to address the issue promptly to prevent further damage to the heating and air conditioning system. Continued driving with this fault may result in decreased comfort and potential system failures.

6. Can I reset the OBDII code B1966 Ford (A/C Post Heater Sensor Circuit Failure) on my own?

- Yes, you can reset the code using an OBDII scanner once the underlying issue has been diagnosed and resolved. However, if the problem persists, further investigation may be necessary.

7. Are there any preventive measures to avoid encountering the A/C Post Heater Sensor Circuit Failure code B1966 in my Ford vehicle?

- Regular maintenance of the heating and air conditioning system, including checking for any unusual odors or sounds, can help prevent issues that may trigger the B1966 fault code.

8. How much does it typically cost to repair the A/C Post Heater Sensor Circuit Failure code B1966 in a Ford vehicle?

- The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast with basic automotive knowledge fix the A/C Post Heater Sensor Circuit Failure related to code B1966 in a Ford?

- While some individuals may have the skills to address the issue themselves, it is recommended to seek assistance from a qualified mechanic to ensure proper diagnosis and repair of the fault.

10. Will fixing the OBDII code B1966 Ford (A/C Post Heater Sensor Circuit Failure) improve the overall performance of my vehicle's heating and air conditioning system?

- Yes, addressing the A/C Post Heater Sensor Circuit Failure can help restore proper functioning of the heating and air conditioning system, leading to improved comfort and performance in your Ford vehicle.

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