AutoCodes – Lincoln – B1966 Lincoln

B1966 Lincoln 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 Lincoln 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.

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Code Popularity 860

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 Jul 31, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1966 Lincoln 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 Lincoln - A/C Post Heater Sensor Circuit Failure - AutoCodes.com — B1966 Lincoln Code - A/C Post Heater Sensor Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1966 Lincoln?

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 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 B1966 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.

Need more information about the B1966 Lincoln code?

Need more information on how to fix the B1966 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1966 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 B1966 Lincoln Code

1. What are the common symptoms of OBDII code B1966 in a Lincoln related to the A/C Post Heater Sensor Circuit Failure?

The common symptoms include the air conditioning system not working properly, lack of heat in the cabin, and potential issues with the heater control.

2. What are the possible causes of OBDII code B1966 in a Lincoln indicating A/C Post Heater Sensor Circuit Failure?

Possible causes include a faulty post heater sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning HVAC control module.

3. How can I diagnose OBDII code B1966 in a Lincoln for the A/C Post Heater Sensor Circuit Failure?

Diagnosis involves using a diagnostic scanner to read the code, checking the sensor and its wiring for any visible damage, and testing the sensor's resistance to determine if it is functioning properly.

4. Is it safe to drive my Lincoln with OBDII code B1966 related to the A/C Post Heater Sensor Circuit Failure?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid discomfort due to the malfunctioning heating and air conditioning system.

5. Can I repair OBDII code B1966 in a Lincoln indicating A/C Post Heater Sensor Circuit Failure myself?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair the issue yourself by replacing the faulty sensor or repairing any damaged wiring. Otherwise, it's best to seek professional help.

6. How much does it typically cost to repair OBDII code B1966 in a Lincoln for the A/C Post Heater Sensor Circuit Failure?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Are there any preventive measures to avoid OBDII code B1966 in a Lincoln related to the A/C Post Heater Sensor Circuit Failure?

To prevent this code from occurring, it's important to perform regular maintenance on your vehicle's heating and air conditioning system and address any issues promptly to avoid further damage.

8. Can OBDII code B1966 in a Lincoln affect the overall performance of the vehicle?

While this code specifically relates to the A/C Post Heater Sensor Circuit Failure, addressing the issue promptly is important to ensure the overall comfort and functionality of the vehicle's heating and cooling systems.

9. How long does it typically take to repair OBDII code B1966 in a Lincoln for the A/C Post Heater Sensor Circuit Failure?

The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours for a professional mechanic to diagnose and fix the problem.

10. Can OBDII code B1966 in a Lincoln be reset after the issue is repaired?

Once the underlying cause of the code has been addressed, a diagnostic scanner can be used to reset the code and clear it from the vehicle's system.