AutoCodes – Mercury – B1178 Mercury

B1178 Mercury Code - Right Power Running Board Deploy And/Or Stow Circuit Short To Battery

Quick Answer

During Power Running Board (PRB) deployment, the PRB module supplies power to the PRB motor and ground through the circuit. Common causes include Faulty Power Running Board Motor Assembly, Power Running Board Motor Assembly harness is open or shorted, Power Running Board Motor Assembly circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1178 Mercury indicates Right Power Running Board Deploy And/Or Stow Circuit Short To Battery.
Common causes: Common causes include Faulty Power Running Board Motor Assembly, Power Running Board Motor Assembly harness is open or shorted, Power Running Board Motor Assembly circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 711

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1178 Mercury Description

During Power Running Board (PRB) deployment, the PRB module supplies power to the PRB motor and ground through the circuit. The PRB module stows the PRB by supplying power to the PRB motor and ground through the circuit. The PRB module provides a regulated 10-volt power supply to the Hall-effect sensor (internal to the PRB motor) through the circuit. The Hall-effect ground is provided by the PRB module through the circuit. The PRB module monitors the PRB Hall-effect signal through the circuit. If the PRB module does not receive any signal from the Hall-effect sensor during operation, the PRB will stop. The PRB module sets this Diagnostic Trouble Code (DTC) if a short to battery voltage is detected in the RH running board motor circuit(s).

OBDII Code B1178 Mercury - Right Power Running Board Deploy And/Or Stow Circuit Short To Battery - AutoCodes.com — B1178 Mercury Code - Right Power Running Board Deploy And/Or Stow Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1178 Mercury?

Faulty Power Running Board Motor Assembly
Power Running Board Motor Assembly harness is open or shorted
Power Running Board Motor Assembly circuit poor electrical connection
Faulty Power Running Board (PRB) Module

How to Fix the DTC B1178 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 B1178 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.

Need more information about the B1178 Mercury code?

Need more information on how to fix the B1178 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1178 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 B1178 Mercury Code

1. What are the common symptoms of OBDII code B1178 in a Mercury related to the Right Power Running Board Deploy And/Or Stow Circuit Short To Battery?

- Common symptoms include malfunctioning power running boards, boards failing to deploy or stow properly, and possibly a warning light on the dashboard.

2. What could cause the OBDII code B1178 in a Mercury indicating a Right Power Running Board Deploy And/Or Stow Circuit Short To Battery?

- The code may be triggered by a short circuit in the wiring, a faulty control module, a malfunctioning motor, or damaged electrical components related to the power running board system.

3. How can I diagnose and repair OBDII code B1178 in my Mercury with the Right Power Running Board Circuit Short To Battery issue?

- Start by inspecting the wiring and connectors for any visible damage. Check the control module and motor for proper functionality. Repair or replace any faulty components as needed.

4. Is it safe to drive my Mercury with an active OBDII code B1178 for the Right Power Running Board Deploy And/Or Stow Circuit Short To Battery?

- It is generally safe to drive the vehicle with this code, but you may experience issues with the power running boards. It is recommended to address the problem promptly to ensure proper operation.

5. Can I reset the OBDII code B1178 in my Mercury related to the Right Power Running Board Deploy And/Or Stow Circuit Short To Battery myself?

- Yes, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is crucial to address the root cause of the issue to prevent the code from reoccurring.

6. Are there any DIY tips for troubleshooting OBDII code B1178 on a Mercury with the Right Power Running Board Circuit Short To Battery problem?

- DIY troubleshooting tips include checking the fuse related to the power running boards, inspecting the wiring harness for damage, and ensuring proper connections at the control module and motor.

7. How much does it typically cost to repair OBDII code B1178 indicating a Right Power Running Board Deploy And/Or Stow Circuit Short To Battery in a Mercury?

- The cost of repair can vary depending on the underlying cause of the issue. It may involve simple fixes like replacing a fuse or more complex repairs such as replacing the control module or motor.

8. Will fixing OBDII code B1178 related to the Right Power Running Board Circuit Short To Battery improve the overall functionality of the power running boards in my Mercury?

- Yes, addressing this code should restore proper operation of the power running boards, allowing them to deploy and stow correctly as designed by the manufacturer.

9. How long does it typically take to repair OBDII code B1178 on a Mercury experiencing the Right Power Running Board Deploy And/Or Stow Circuit Short To Battery issue?

- The repair time can vary depending on the extent of the problem and the availability of parts. Simple fixes may take a short time, while more complex repairs could require more labor hours.

10. Can OBDII code B1178 in a Mercury related to the Right Power Running Board Deploy And/Or Stow Circuit Short To Battery cause any other electrical issues in the vehicle?

- While the code specifically relates to the power running board system, it is essential to address it promptly to prevent any potential electrical malfunctions or damage to other components in the vehicle.