AutoCodes – Generic – C2791

C2791 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 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 973

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

What does this mean?

What are the Possible Causes of the DTC C2791?

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?

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 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 code?

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

Need Help with the Code?

Get the C2791 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C2791 Ford — Power Steering Motor Circuit Open
C2791 Lincoln — Power Steering Motor Circuit Open
C2791 Mercury — Power Steering Motor Circuit Open

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 Code

1. What are the common symptoms of OBDII code C2791 (Power Steering Motor Circuit Open)?

The common symptoms include difficulty steering, loss of power steering assist, and the illumination of the power steering warning light on the dashboard.

2. What could be the possible causes of OBDII code C2791?

Possible causes of this code include damaged wiring or connectors in the power steering motor circuit, a faulty power steering control module, or a malfunctioning power steering motor.

3. How can I diagnose the Power Steering Motor Circuit Open issue?

Diagnosing this issue typically involves conducting a thorough inspection of the power steering system, checking for damaged wiring or connectors, testing the power steering control module, and ensuring proper power supply to the motor.

4. Can I drive my vehicle with OBDII code C2791 present?

It is not recommended to drive your vehicle with this code present, as it may lead to sudden loss of power steering assist, making it difficult to steer the vehicle safely.

5. How can I repair OBDII code C2791?

Repairing this code usually involves repairing or replacing damaged wiring or connectors in the power steering motor circuit, testing and potentially replacing the power steering control module, or replacing the power steering motor if necessary.

6. Will resetting the fault codes make OBDII code C2791 disappear?

Resetting the fault codes may temporarily clear the code, but if the underlying issue causing the Power Steering Motor Circuit Open is not addressed, the code is likely to reappear once the system detects the problem again.

7. Can a DIY enthusiast fix OBDII code C2791 at home?

While some aspects of diagnosing and repairing this code may be feasible for DIY enthusiasts with the necessary skills and tools, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

8. Is OBDII code C2791 specific to a certain make or model of vehicle?

This code is not specific to a particular make or model and can appear in various vehicles equipped with OBDII systems, particularly those with electric power steering systems.

9. How urgent is it to address OBDII code C2791?

It is essential to address this code promptly to avoid potential safety risks associated with loss of power steering assist while driving.

10. What is the typical cost to repair OBDII code C2791?

The cost of repairing this code can vary depending on the underlying cause and the extent of the repairs needed, but it may involve expenses for parts and labor ranging from a few hundred to a few thousand dollars.