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Engine-Codes – GMC – C158C 2017 GMC Sierra

C158C 2017 GMC Sierra Code - Steering Assist Hydraulic Pressure Out of Range

Quick Answer

The C158C diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the steering assist hydraulic pressure is out of range. Common causes include Low power steering fluid level, Malfunctioning power steering pump, Leaking power steering hoses or connections. 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
C158C 2017 GMC Sierra indicates Steering Assist Hydraulic Pressure Out of Range.
Common causes
Common causes include Low power steering fluid level, Malfunctioning power steering pump, Leaking power steering hoses or connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code C158C 2017 GMC Sierra Description

The C158C diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the steering assist hydraulic pressure is out of range. This means that there is an issue with the hydraulic system that assists in steering the vehicle, potentially leading to difficulties in steering control. The power steering system in modern vehicles relies on hydraulic pressure to make steering easier for the driver, especially at low speeds or when parking. When the hydraulic pressure is out of range, it can affect the vehicle's handling and overall driving experience.

OBDII Code C158C 2017 GMC Sierra - Steering Assist Hydraulic Pressure Out of Range
C158C 2017 GMC Sierra Code - Steering Assist Hydraulic Pressure Out of Range

Common Causes of C158C 2017 GMC Sierra

  1. Low power steering fluid level
  2. Malfunctioning power steering pump
  3. Leaking power steering hoses or connections
  4. Faulty power steering pressure sensor
  5. Clogged power steering filter

Symptoms of C158C 2017 GMC Sierra

  1. Stiff or heavy steering
  2. Steering wheel vibration or shaking
  3. Whining noise when turning the steering wheel
  4. Difficulty steering at low speeds
  5. Steering wheel not returning to center position

How to Fix C158C 2017 GMC Sierra

  1. Check power steering fluid level and top up if low.
  2. Inspect power steering pump for proper operation and replace if necessary.
  3. Check power steering hoses and connections for leaks and repair or replace as needed.
  4. Test power steering pressure sensor and replace if faulty.
  5. Flush power steering system and replace filter if clogged.

Cost to Fix C158C 2017 GMC Sierra

The typical repair costs for addressing a steering assist hydraulic pressure out of range issue can vary depending on the specific cause of the problem and the extent of repairs needed. In general, the cost of parts such as a power steering pump, hoses, pressure sensor, and fluid can range from $200 to $600. Labor costs can add an additional $150 to $300, bringing the total repair cost to approximately $350 to $900. It's important to note that these are rough estimates, and actual costs may vary based on the location, vehicle make and model, and labor rates at the auto repair shop. It's recommended to obtain a detailed quote from a trusted mechanic before proceeding with the repairs.

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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 C158C 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code C158C in a 2017 GMC Sierra related to Steering Assist Hydraulic Pressure Out of Range?

The common symptoms include difficulty steering, uneven steering response, and the steering wheel feeling heavy or sluggish.

2. What are the possible causes of OBDII code C158C in a 2017 GMC Sierra indicating Steering Assist Hydraulic Pressure Out of Range?

Potential causes may include a malfunctioning power steering pump, low power steering fluid level, a faulty power steering pressure sensor, or issues with the power steering control module.

3. How can I diagnose the Steering Assist Hydraulic Pressure Out of Range issue related to code C158C in a 2017 GMC Sierra?

Diagnosis typically involves performing a thorough inspection of the power steering system, checking for leaks, testing the power steering pump, pressure sensor, and related components using a diagnostic scanner, and reviewing the error codes stored in the vehicle's computer.

4. What are some DIY repair tips for addressing OBDII code C158C in a 2017 GMC Sierra linked to Steering Assist Hydraulic Pressure Out of Range?

DIY repair tips may include checking and refilling the power steering fluid, inspecting for visible leaks, ensuring the power steering belt is properly tensioned, and conducting a visual inspection of the power steering components for any signs of damage.

5. Is it safe to continue driving a 2017 GMC Sierra with OBDII code C158C related to Steering Assist Hydraulic Pressure Out of Range?

It is not recommended to drive the vehicle extensively with this issue, as it may lead to unsafe driving conditions and potential loss of steering control. It's advisable to address the problem promptly to avoid further damage or safety risks.

6. Can resetting the OBDII code C158C in a 2017 GMC Sierra resolve the Steering Assist Hydraulic Pressure Out of Range problem?

Resetting the code may temporarily clear the error from the system, but if the underlying issue causing the code is not addressed, it is likely to return. It's crucial to diagnose and fix the root cause of the problem.

7. How much does it typically cost to repair OBDII code C158C in a 2017 GMC Sierra related to Steering Assist Hydraulic Pressure Out of Range?

The cost of repair can vary depending on the specific cause of the issue, parts needed for replacement, labor rates, and whether you choose to repair it yourself or take it to a mechanic. It's advisable to get multiple quotes for an accurate estimate.

8. Can extreme weather conditions affect the occurrence of OBDII code C158C in a 2017 GMC Sierra related to Steering Assist Hydraulic Pressure Out of Range?

Extreme temperatures, particularly very cold weather, can sometimes exacerbate power steering system issues, leading to symptoms associated with code C158C. It's important to monitor the system's performance in different weather conditions.

9. Is the Steering Assist Hydraulic Pressure Out of Range issue covered under warranty for a 2017 GMC Sierra?

Warranty coverage for this specific issue may vary depending on the vehicle's warranty status, mileage, and the underlying cause of the problem. Check with your GMC dealership or refer to your warranty documentation for more information.

10. Are there any recalls related to OBDII code C158C and Steering Assist Hydraulic Pressure Out of Range in a 2017 GMC Sierra?

Recalls related to this specific issue can be checked by contacting your local GMC dealership, visiting the manufacturer's website, or checking with the National Highway Traffic Safety Administration (NHTSA) for any relevant recall information.

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