C158C 2018 GMC Sierra Code - Steering Assist Hydraulic Pressure Out of Range
Quick Answer
The Active Hydraulic Assist Power Steering Control Module uses a pressure sensor to measure the hydraulic pressure in the left and right chambers of steering gear. Common causes include Faulty Steering Gear Pressure Sensor, Steering Gear Pressure Sensor harness is open or shorted, Steering Gear Pressure Sensor 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
- C158C 2018 GMC Sierra indicates Steering Assist Hydraulic Pressure Out of Range.
- Common causes
- Common causes include Faulty Steering Gear Pressure Sensor, Steering Gear Pressure Sensor harness is open or shorted, Steering Gear Pressure Sensor 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.
Code C158C 2018 GMC Sierra Description
What are the Possible Causes of the DTC C158C 2018 GMC Sierra?
- Faulty Steering Gear Pressure Sensor
- Steering Gear Pressure Sensor harness is open or shorted
- Steering Gear Pressure Sensor circuit poor electrical connection
- Faulty Power Steering Control Module
How to Fix the DTC C158C 2018 GMC Sierra?
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 C158C 2018 GMC Sierra 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 C158C 2018 GMC Sierra code?
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Frequently Asked Questions about C158C 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code C158C on a 2018 GMC Sierra related to Steering Assist Hydraulic Pressure Out of Range?
- Common symptoms include stiff or heavy steering, steering wheel jerking or pulling to one side, and a "Service Power Steering" message on the dashboard.
2. What are the potential causes of OBDII code C158C on a 2018 GMC Sierra?
- The code C158C can be triggered by issues with the power steering system, such as low power steering fluid, a faulty power steering pump, a malfunctioning steering angle sensor, or a problem with the hydraulic pressure sensor.
3. How can I diagnose the OBDII code C158C on my 2018 GMC Sierra?
- Diagnosing the code typically involves using a diagnostic scanner to retrieve the specific code and checking the power steering system components for any visible signs of damage or leaks.
4. What are some repair tips for fixing OBDII code C158C on a 2018 GMC Sierra?
- Start by checking the power steering fluid level and quality, inspecting the power steering pump for proper operation, ensuring the steering angle sensor is calibrated correctly, and testing the hydraulic pressure sensor for any issues.
5. Can I continue driving my 2018 GMC Sierra with OBDII code C158C?
- It is not recommended to continue driving the vehicle with code C158C, as it can lead to unsafe driving conditions and potential steering failure. It is best to address the issue promptly to avoid further damage.
6. How much does it typically cost to repair OBDII code C158C on a 2018 GMC Sierra?
- The cost of repair can vary depending on the exact cause of the issue. It is advisable to consult a professional mechanic for a proper diagnosis and an accurate estimate of repair costs.
7. Is it possible to reset OBDII code C158C on a 2018 GMC Sierra without fixing the underlying issue?
- While you can clear the code temporarily with a diagnostic scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing and to ensure the safety and proper functioning of the power steering system.
8. Are there any recalls or technical service bulletins related to OBDII code C158C on a 2018 GMC Sierra?
- It is recommended to check with your local GMC dealership or visit the manufacturer's website to see if there are any relevant recalls or technical service bulletins related to code C158C on your specific vehicle model.
9. Can extreme weather conditions affect OBDII code C158C on a 2018 GMC Sierra?
- Yes, extreme temperatures can potentially impact the power steering system and trigger code C158C. Cold weather can cause power steering fluid to thicken, affecting hydraulic pressure, while hot weather can lead to fluid leaks or pump malfunctions.
10. How can regular maintenance help prevent OBDII code C158C on a 2018 GMC Sierra?
- Regularly checking and maintaining the power steering system, including monitoring fluid levels, inspecting for leaks, and ensuring all components are in good condition, can help prevent issues like code C158C from occurring.
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