B295B Mercury Code - Left Blend Door Potentiometer Feedback Short to Ground
Quick Answer
Under normal operation, to rotate the blend door actuator, the Electronic Manual Temperature Control (EMTC) or Electronic Automatic Temperature Control (EATC) module supplies voltage to the actuator motors through the door actuator clockwise circuits, and supplies ground through the door actuator counterclockwise circuits. Common causes include Faulty Left Blend Door Actuator, Left Blend Door Actuator harness is open or shorted, Left Blend Door Actuator 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
- B295B Mercury indicates Left Blend Door Potentiometer Feedback Short to Ground.
- Common causes
- Common causes include Faulty Left Blend Door Actuator, Left Blend Door Actuator harness is open or shorted, Left Blend Door Actuator 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 B295B Mercury Description
The actuator feedback resistors are supplied a ground from the EMTC module or EATC module by the door actuator return circuits and a 5-volt reference voltage on the door actuator reference circuits. The EMTC module or EATC module reads the voltage on the blend door actuator feedback circuits to determine the door actuator position, by the position of the actuator feedback resistor wiper arm.
What are the Possible Causes of the DTC B295B Mercury?
- Faulty Left Blend Door Actuator
- Left Blend Door Actuator harness is open or shorted
- Left Blend Door Actuator circuit poor electrical connection
- Faulty Electronic Manual Temperature Control (EMTC) or Electronic Automatic Temperature Control (EATC)
How to Fix the DTC B295B 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 B295B 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 B295B Mercury Code
1. What does the OBDII code B295B mean on a Mercury vehicle?
The B295B code indicates a "Left Blend Door Potentiometer Feedback Short to Ground," meaning there is an electrical issue with the blend door feedback circuit.
2. What are the symptoms of the B295B code on a Mercury?
Common symptoms include inconsistent or no control over cabin temperature, unusual clicking noises from the HVAC system, and improper airflow direction.
3. What causes the B295B code to appear?
The code is typically caused by a shorted or damaged blend door potentiometer, a wiring issue such as a short to ground, or a faulty HVAC control module.
4. Can I drive my Mercury with the B295B code active?
Yes, you can still drive the vehicle, but the HVAC system may not function properly, affecting cabin comfort.
5. How do I diagnose the B295B code?
Diagnosis involves inspecting the blend door potentiometer, checking for damaged or shorted wires, and using a multimeter to test the circuit for continuity.
6. What is the blend door potentiometer?
The blend door potentiometer is a sensor that monitors the position of the blend door, which adjusts the mix of hot and cold air in the HVAC system.
7. How do you fix the B295B code on a Mercury?
Repairs may include replacing the faulty blend door potentiometer, repairing damaged wiring, or, in some cases, replacing the HVAC control module.
8. How much does it cost to fix the B295B code on a Mercury?
The repair cost can vary, but replacing a blend door potentiometer generally ranges from $150 to $400, depending on labor and part costs.
9. Can a blown fuse cause the B295B code?
A blown fuse is unlikely to directly cause the B295B code, but it’s important to check the fuse box for related circuits to rule out electrical issues.
10. Does resetting the code fix the B295B issue?
Resetting the code may temporarily clear it, but the underlying issue with the blend door potentiometer or wiring must be resolved to prevent the code from returning.
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