B1946 Mercury Code - Climate Control A/C Post Evaporator Sensor Circuit Failure
Quick Answer
The Dual Automatic Temperature Control (DATC) Module monitors the Climate Control A/C Post Evaporator Sensor. Common causes include Faulty Climate Control A/C Post Evaporator Sensor, Climate Control A/C Post Evaporator Sensor harness is open or shorted, Climate Control A/C Post Evaporator 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
- B1946 Mercury indicates Climate Control A/C Post Evaporator Sensor Circuit Failure.
- Common causes
- Common causes include Faulty Climate Control A/C Post Evaporator Sensor, Climate Control A/C Post Evaporator Sensor harness is open or shorted, Climate Control A/C Post Evaporator 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.
Code B1946 Mercury Description
What are the Possible Causes of the DTC B1946 Mercury?
- Faulty Climate Control A/C Post Evaporator Sensor
- Climate Control A/C Post Evaporator Sensor harness is open or shorted
- Climate Control A/C Post Evaporator Sensor circuit poor electrical connection
- Faulty Dual Automatic Temperature Control (DATC)
How to Fix the DTC B1946 Mercury?
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 B1946 Mercury 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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Frequently Asked Questions about B1946 Mercury Code
1. What does OBDII code B1946 mean on a Mercury vehicle?
Code B1946 indicates a failure in the Climate Control A/C Post Evaporator Sensor Circuit, which monitors the temperature of the air exiting the evaporator.
2. What are the symptoms of code B1946 in a Mercury?
Common symptoms include ineffective air conditioning, inconsistent cabin temperatures, or the climate control system not functioning properly.
3. What causes the B1946 code to appear?
Possible causes include a faulty post-evaporator temperature sensor, damaged wiring or connectors in the circuit, or an issue with the climate control module.
4. Can I still drive my Mercury with code B1946 active?
Yes, you can still drive the vehicle, but the air conditioning system may not work correctly, leading to discomfort in extreme weather conditions.
5. How do I diagnose code B1946 on a Mercury?
Diagnosis involves inspecting the post-evaporator temperature sensor, checking the wiring and connectors for damage, and testing the circuit for continuity or short circuits.
6. Can a faulty post-evaporator sensor trigger code B1946?
Yes, a malfunctioning or damaged post-evaporator temperature sensor is one of the most common reasons for this code.
7. How is code B1946 fixed on a Mercury?
Repairs may include replacing the post-evaporator temperature sensor, repairing damaged wiring or connectors, or reprogramming the climate control module if necessary.
8. What tools are needed to repair code B1946?
You'll typically need a multimeter to test the circuit, an OBDII scanner to clear the code, and basic tools to access and replace components.
9. How much does it cost to fix code B1946 on a Mercury?
The repair cost can vary, but replacing the post-evaporator sensor typically costs $100-$300, depending on labor charges and parts pricing.
10. Can a blown fuse cause code B1946 on a Mercury?
While rare, a blown fuse related to the climate control system could interrupt the sensor circuit and trigger this code. Always check fuses during the diagnosis.
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