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Engine-Codes – GMC – C158C 2014 GMC Sierra

C158C 2014 GMC Sierra Code - Steering Assist Hydraulic Pressure Out of Range

Quick Answer

The C158C diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the steering assist hydraulic pressure is out of range. Common causes include Low power steering fluid levels, Malfunctioning power steering pump, Leaking power steering hoses. 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 2014 GMC Sierra indicates Steering Assist Hydraulic Pressure Out of Range.
Common causes
Common causes include Low power steering fluid levels, Malfunctioning power steering pump, Leaking power steering hoses.
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 17, 2024
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Code C158C 2014 GMC Sierra Description

The C158C diagnostic trouble code (DTC) for a 2014 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. The power steering system in modern vehicles uses hydraulic pressure to make steering easier for the driver. When the hydraulic pressure is out of range, it can lead to difficulty in steering the vehicle, potentially causing safety concerns.

OBDII Code C158C 2014 GMC Sierra - Steering Assist Hydraulic Pressure Out of Range
C158C 2014 GMC Sierra Code - Steering Assist Hydraulic Pressure Out of Range

Common Causes of C158C 2014 GMC Sierra

  1. Low power steering fluid levels
  2. Malfunctioning power steering pump
  3. Leaking power steering hoses
  4. Faulty power steering pressure sensor
  5. Issues with the power steering control module

Symptoms of C158C 2014 GMC Sierra

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

How to Fix C158C 2014 GMC Sierra

  1. Check power steering fluid levels and top up if necessary.
  2. Inspect power steering pump for any signs of damage or malfunction and replace if needed.
  3. Check power steering hoses for leaks and repair or replace as necessary.
  4. Test power steering pressure sensor and replace if faulty.
  5. Scan the power steering control module for any error codes and reset or replace as needed.

Cost to Fix C158C 2014 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. On average, the cost of parts and labor for this repair can range from $200 to $800. However, it's important to note that the actual cost may be higher or lower based on factors such as the location of the repair shop, the make and model of the vehicle, and the extent of the damage. It's recommended to consult with a qualified mechanic for a more accurate cost estimate based on your individual circumstances. Additionally, labor rates at auto repair shops typically range from $80 to $150 per hour, but rates may vary.

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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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code C158C in a 2014 GMC Sierra related to Steering Assist Hydraulic Pressure Out of Range?

The common symptoms include difficulty steering, stiff steering wheel, steering wheel vibrations, and a warning light on the dashboard.

2. What are the possible causes of OBDII code C158C in a 2014 GMC Sierra?

Possible causes include a malfunctioning power steering pump, low power steering fluid levels, a faulty steering angle sensor, or issues with the power steering control module.

3. How can I diagnose the Steering Assist Hydraulic Pressure Out of Range issue in my 2014 GMC Sierra?

Diagnosing this issue involves checking the power steering fluid levels, inspecting the power steering pump for any leaks or damage, and using an OBDII scanner to read the trouble codes.

4. Can I continue driving my 2014 GMC Sierra with OBDII code C158C present?

It is not recommended to continue driving with this code present, as it may affect the steering performance of your vehicle and potentially lead to safety issues.

5. How can I repair OBDII code C158C in my 2014 GMC Sierra?

Repair options may include replacing the power steering pump, topping up power steering fluid, recalibrating the steering angle sensor, or reprogramming the power steering control module.

6. Is it safe to reset the OBDII code C158C in my 2014 GMC Sierra without addressing the underlying issue?

Resetting the code without addressing the root cause may temporarily clear the warning light, but the problem will likely resurface, affecting the steering performance of your vehicle.

7. Are there any preventive maintenance tips to avoid OBDII code C158C in a 2014 GMC Sierra?

Regularly checking power steering fluid levels, addressing any leaks promptly, and following the manufacturer's recommended maintenance schedule for the power steering system can help prevent this issue.

8. Can extreme weather conditions contribute to triggering OBDII code C158C in a 2014 GMC Sierra?

Extreme temperatures, especially cold weather, can sometimes exacerbate power steering issues, leading to the Steering Assist Hydraulic Pressure Out of Range code.

9. How long does it typically take to repair OBDII code C158C in a 2014 GMC Sierra?

The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose and address the problem effectively.

10. Should I take my 2014 GMC Sierra to a professional mechanic for OBDII code C158C repair?

Given the complexity of power steering systems and the safety implications of steering issues, it is advisable to seek assistance from a qualified mechanic to diagnose and repair OBDII code C158C in your GMC Sierra.

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