C158C 2015 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 2015 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 2015 GMC Sierra Description
What are the Possible Causes of the DTC C158C 2015 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 2015 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 2015 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 2015 GMC Sierra code?
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Frequently Asked Questions about C158C 2015 GMC Sierra Code
What does the OBDII code C158C mean for a 2015 GMC Sierra?
Code C158C indicates that the steering assist hydraulic pressure is out of range, meaning there’s an issue with the hydraulic pressure system used to assist steering.
What are the common symptoms of code C158C in a 2015 GMC Sierra?
Symptoms include heavy or stiff steering, warning lights on the dashboard, and reduced steering responsiveness.
What causes code C158C in a 2015 GMC Sierra?
Possible causes include a faulty hydraulic pressure sensor, low or contaminated power steering fluid, a malfunctioning power steering pump, or damaged wiring.
Can low power steering fluid trigger code C158C?
Yes, low or contaminated power steering fluid can cause hydraulic pressure to fall out of range, triggering this code.
How can I diagnose code C158C in my GMC Sierra?
Start by checking the power steering fluid level and condition, inspecting the wiring and connectors for damage, and testing the hydraulic pressure sensor.
Is code C158C safe to drive with?
While you may still be able to drive, ignoring this code can lead to more severe steering issues and potential safety concerns.
How can I fix code C158C on my 2015 GMC Sierra?
Repairs may include replacing the hydraulic pressure sensor, flushing or refilling the power steering fluid, repairing wiring, or replacing the power steering pump.
Can a faulty hydraulic pressure sensor cause code C158C?
Yes, a malfunctioning hydraulic pressure sensor can send inaccurate data to the vehicle’s computer, triggering this code.
How much does it cost to repair code C158C in a 2015 GMC Sierra?
Costs vary depending on the issue. Replacing a hydraulic pressure sensor might cost $100-$300, while a power steering pump replacement could exceed $500.
Do I need a mechanic to fix code C158C?
Simple fixes like refilling power steering fluid can be done at home, but diagnosing and repairing sensor or pump issues may require a mechanic’s expertise.
Discuss the causes and fixes for C158C 2015 GMC Sierra OBDII Code
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