AutoCodes – Mercury – C2791 Mercury

C2791 Mercury Code - Power Steering Motor Circuit Open

Quick Answer

The Power Steering Control Module receives the voltage to ground through the circuit. Common causes include Faulty Power Steering Control Module, Power Steering Control Module harness is open or shorted, Power Steering Control Module 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: C2791 Mercury indicates Power Steering Motor Circuit Open.
Common causes: Common causes include Faulty Power Steering Control Module, Power Steering Control Module harness is open or shorted, Power Steering Control Module 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 748

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2791 Mercury Description

The Power Steering Control Module receives the voltage to ground through the circuit. The Power Steering Control Module sends power to the torque sensor and provides a ground path for the torque sensor. The Power Steering Control Module receives signals from the torque sensor, which is dependent upon the torque being requested by the steering input. The Power Steering Control Module sends varying amperage dependent upon the desired output of the power steering control module. The Power Steering Control Module sets the OBDII code when the Power Steering Motor is not to factory specifications.

OBDII Code C2791 Mercury - Power Steering Motor Circuit Open - AutoCodes.com — C2791 Mercury Code - Power Steering Motor Circuit Open

What does this mean?

What are the Possible Causes of the DTC C2791 Mercury?

Faulty Power Steering Control Module
Power Steering Control Module harness is open or shorted
Power Steering Control Module circuit poor electrical connection
Intermediate shaft U-joints
Steering column bearings
Ball Joints
Strut bearings
Steering gear

How to Fix the DTC C2791 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 C2791 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 C2791 Mercury code?

Need more information on how to fix the C2791 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2791 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 C2791 Mercury Code

1. What are common symptoms of OBDII code C2791 in a Mercury related to the power steering motor circuit open?

The common symptoms of OBDII code C2791 in a Mercury include difficulty steering, stiff steering wheel, and the power steering system not functioning properly.

2. What are possible causes of the power steering motor circuit open OBDII code C2791 in a Mercury?

Possible causes of the OBDII code C2791 in a Mercury related to the power steering motor circuit open include damaged wiring, a faulty power steering motor, or a malfunctioning power steering control module.

3. How can I diagnose the power steering motor circuit open issue causing OBDII code C2791 in my Mercury?

Diagnosing the power steering motor circuit open issue causing OBDII code C2791 in a Mercury involves checking the wiring for any damage, testing the power steering motor for proper functionality, and scanning the power steering control module for fault codes.

4. Can I continue driving my Mercury with the power steering motor circuit open OBDII code C2791?

It is not recommended to drive your Mercury with the power steering motor circuit open OBDII code C2791 as it can lead to unsafe driving conditions and potential damage to the power steering system.

5. How can I repair the power steering motor circuit open issue triggering OBDII code C2791 in my Mercury?

To repair the power steering motor circuit open issue causing OBDII code C2791 in your Mercury, you may need to repair or replace damaged wiring, replace the faulty power steering motor, or reprogram the power steering control module.

6. Is it possible to reset the OBDII code C2791 related to the power steering motor circuit open in my Mercury without fixing the underlying issue?

Resetting the OBDII code C2791 related to the power steering motor circuit open in your Mercury without fixing the underlying issue will likely result in the code reappearing once the system detects the problem again.

7. Are there any preventative maintenance tips to avoid encountering the power steering motor circuit open OBDII code C2791 in my Mercury?

To prevent encountering the power steering motor circuit open OBDII code C2791 in your Mercury, it is advisable to regularly inspect the power steering system for any signs of wear or damage and address any issues promptly.

8. Can a DIY enthusiast with basic automotive knowledge fix the power steering motor circuit open OBDII code C2791 in a Mercury?

Depending on the specific issue causing the power steering motor circuit open OBDII code C2791 in your Mercury, a DIY enthusiast with basic automotive knowledge may be able to address some repairs like checking and replacing damaged wiring. However, more complex repairs may require professional assistance.

9. How long does it typically take to repair the power steering motor circuit open issue leading to OBDII code C2791 in a Mercury?

The time it takes to repair the power steering motor circuit open issue causing OBDII code C2791 in a Mercury can vary depending on the exact cause of the problem and the extent of repairs needed. It may range from a few hours to a full day in more complex cases.

10. Are there any recalls or technical service bulletins related to the power steering motor circuit open OBDII code C2791 in Mercury vehicles?

It is advisable to check with your local Mercury dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to the power steering motor circuit open OBDII code C2791 in your specific Mercury vehicle model.