AutoCodes – Mercury – B2959 Mercury

B2959 Mercury Code - Panel/Defrost Door Close Circuit Short/Failure

Quick Answer

Under normal operation, to rotate the mode door actuator clockwise, the Electric Manual Temperature Control (EMTC) module or Electronic Automatic Temperature Control (EATC) module supplies voltage to the Blend, Floor/Defrost and Panel mode door actuator motors through the door actuator feed B circuits, and supplies ground through the door actuator feed A circuits. Common causes include Faulty Panel/Defrost Door Actuator Motor, Panel/Defrost Door Actuator Motor harness is open or shorted, Panel/Defrost Door Actuator Motor 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: B2959 Mercury indicates Panel/Defrost Door Close Circuit Short/Failure.
Common causes: Common causes include Faulty Panel/Defrost Door Actuator Motor, Panel/Defrost Door Actuator Motor harness is open or shorted, Panel/Defrost Door Actuator Motor 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 403

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 Feb 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2959 Mercury Description

Under normal operation, to rotate the mode door actuator clockwise, the Electric Manual Temperature Control (EMTC) module or Electronic Automatic Temperature Control (EATC) module supplies voltage to the Blend, Floor/Defrost and Panel mode door actuator motors through the door actuator feed B circuits, and supplies ground through the door actuator feed A circuits. To rotate the mode door actuator counterclockwise, the EMTC module or EATC module reverses the voltage and ground circuits.
The mode door actuator feedback resistors are supplied a ground from the EMTC module or EATC module by the mode door actuator return circuits and a 5-volt reference voltage on the mode door actuator reference circuits. The EMTC module or EATC module reads the voltage on the mode door actuator feedback circuits to determine the mode door actuator position by the position of the actuator feedback resistor wiper arm.

OBDII Code B2959 Mercury - Panel/Defrost Door Close Circuit Short/Failure - AutoCodes.com — B2959 Mercury Code - Panel/Defrost Door Close Circuit Short/Failure

What does this mean?

What are the Possible Causes of the DTC B2959 Mercury?

Faulty Panel/Defrost Door Actuator Motor
Panel/Defrost Door Actuator Motor harness is open or shorted
Panel/Defrost Door Actuator Motor circuit poor electrical connection
Faulty Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module

How to Fix the DTC B2959 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 B2959 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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Get the B2959 Mercury 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 B2959 Mercury Code

1. What are the common symptoms of OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- Common symptoms include issues with the operation of the panel/defrost door, such as the door not closing properly or the HVAC system not functioning correctly.

2. What are the possible causes of OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- The code can be triggered by a short circuit in the panel/defrost door close circuit, a failure in the door actuator, wiring issues, or a faulty control module.

3. How can I diagnose OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- Diagnosis typically involves using a scan tool to read the code, checking the operation of the panel/defrost door, inspecting the wiring for any damage, and testing the door actuator.

4. What are the repair options for OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- Repair options may include repairing or replacing damaged wiring, replacing the door actuator, or reprogramming the control module. It is recommended to follow the manufacturer's repair procedures.

5. Can I continue driving my Mercury with OBDII code B2959 (Panel/Defrost Door Close Circuit Short/Failure)?

- It is not advisable to ignore this code, as it can affect the proper functioning of the HVAC system in your vehicle. It is recommended to address the issue as soon as possible.

6. How much does it typically cost to repair OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- The cost of repair can vary depending on the underlying cause of the issue, parts needed, and labor costs. It is recommended to consult a professional mechanic for an accurate estimate.

7. Are there any preventive measures to avoid OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- Regular maintenance of your vehicle's HVAC system and addressing any issues promptly can help prevent the occurrence of this code. Checking the wiring and components during routine inspections can also help.

8. Can a DIY enthusiast fix OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- While some DIY enthusiasts may have the skills to diagnose and repair this issue, it is recommended to seek professional assistance due to the complexity of the HVAC system and electrical components involved.

9. How long does it typically take to repair OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure?

- The repair time can vary depending on the specific cause of the issue, availability of parts, and the skill level of the mechanic. It is advisable to consult with the repair shop for an estimated timeframe.

10. Will resetting the OBDII code B2959 (Mercury) Panel/Defrost Door Close Circuit Short/Failure make it go away permanently?

- Simply resetting the code may clear it temporarily, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent recurrence.