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Engine-Codes – Lincoln – B1946 Lincoln

B1946 Lincoln Code - Climate Control A/C Post Evaporator Sensor Circuit Failure

Quick Answer

The B1946 diagnostic trouble code for Lincoln vehicles indicates a Climate Control A/C Post Evaporator Sensor Circuit Failure. Common causes include Faulty post-evaporator sensor, Wiring issues or electrical connections related to the sensor circuit, Corrosion or damage to the sensor circuit components. 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
B1946 Lincoln indicates Climate Control A/C Post Evaporator Sensor Circuit Failure.
Common causes
Common causes include Faulty post-evaporator sensor, Wiring issues or electrical connections related to the sensor circuit, Corrosion or damage to the sensor circuit components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B1946 Lincoln Description

The B1946 diagnostic trouble code for Lincoln vehicles indicates a Climate Control A/C Post Evaporator Sensor Circuit Failure. This code is specifically related to the sensor circuit that monitors the temperature after the evaporator in the vehicle's air conditioning system. The post-evaporator sensor plays a crucial role in ensuring that the air conditioning system functions properly by regulating the temperature of the air that is being circulated inside the vehicle.

OBDII Code B1946 Lincoln - Climate Control A/C Post Evaporator Sensor Circuit Failure
B1946 Lincoln Code - Climate Control A/C Post Evaporator Sensor Circuit Failure

Common Causes of B1946 Lincoln

  1. Faulty post-evaporator sensor.
  2. Wiring issues or electrical connections related to the sensor circuit.
  3. Corrosion or damage to the sensor circuit components.
  4. Issues with the climate control module or related components.
  5. Environmental factors such as moisture or debris affecting the sensor circuit.

Symptoms of B1946 Lincoln

  1. Inconsistent temperature control inside the vehicle.
  2. Lack of cooling or heating from the air conditioning system.
  3. Unusual or erratic behavior from the climate control system.
  4. Illumination of the check engine light or climate control warning light on the dashboard.

How to Fix B1946 Lincoln

  1. Begin by diagnosing the specific cause of the B1946 code using a diagnostic scanner to pinpoint the issue with the post-evaporator sensor circuit.
  2. Inspect the sensor circuit wiring and connections for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components as needed.
  3. Test the post-evaporator sensor itself to determine if it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Clear the diagnostic trouble codes from the vehicle's computer system using the diagnostic scanner.
  5. Test the climate control system to ensure that the issue has been resolved and that the sensor circuit is functioning properly.

Cost to Fix B1946 Lincoln

The typical repair costs for addressing a Climate Control A/C Post Evaporator Sensor Circuit Failure can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue is typically between $150 and $500. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repairs needed. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific circumstances of the vehicle in question.

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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 B1946 Lincoln Code

1. What does the OBDII code B1946 mean on a Lincoln vehicle?

Code B1946 indicates a failure in the Climate Control A/C Post Evaporator Sensor Circuit, which monitors the temperature of air leaving the evaporator.

2. What are the common symptoms of the B1946 code?

Common symptoms include improper A/C performance, inconsistent cabin temperatures, and possible malfunction of the automatic climate control system.

3. What causes the B1946 code to appear?

This code can be triggered by a faulty evaporator temperature sensor, damaged wiring or connectors, or a malfunctioning climate control module.

4. Can I still drive my Lincoln with the B1946 code?

Yes, you can drive the vehicle, but the A/C system may not function optimally, leading to discomfort in the cabin.

5. How do I diagnose the B1946 code?

Start by inspecting the evaporator temperature sensor and its wiring for damage or disconnections. Use a multimeter to check for proper electrical resistance and continuity in the circuit.

6. How do I fix the B1946 code?

Repairs may include replacing the evaporator temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming the climate control module if necessary.

7. How much does it cost to repair a B1946 code?

The cost can vary, but replacing an evaporator temperature sensor typically ranges from $100 to $300, including parts and labor.

8. Can a B1946 code be cleared without repairs?

The code may be cleared temporarily by resetting the system, but it will return if the underlying issue is not resolved.

9. Is the B1946 code specific to Lincoln vehicles?

While the code format is standard across OBDII systems, the exact definition and application of B1946 may vary between manufacturers, but it commonly relates to the A/C system.

10. What tools are needed to troubleshoot the B1946 code?

You’ll need an OBDII scanner, a multimeter, and possibly a wiring diagram for your Lincoln's climate control system.

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