P0158 2017 GMC Sierra Code - HO2S Circuit High Voltage Bank 2 Sensor 2
Quick Answer
The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0158 2017 GMC Sierra indicates HO2S Circuit High Voltage Bank 2 Sensor 2.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0158 2017 GMC Sierra Description
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S voltage is greater than 1, 050 mV.
What are the Possible Causes of the DTC P0158 2017 GMC Sierra?
- Faulty Rear Heated Oxygen Sensor Bank 2
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Low or high fuel system pressure
- Fuel contamination
- Faulty fuel injectors
- Exhaust gas leaks
- Engine vacuum leaks
How to Fix the DTC P0158 2017 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.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0158 2017 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.
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Frequently Asked Questions about P0158 2017 GMC Sierra Code
1. What does the OBDII code P0158 mean on a 2017 GMC Sierra?
P0158 indicates that the oxygen sensor (HO2S) on Bank 2 Sensor 2 is detecting a high voltage signal, which typically means the sensor is reporting a rich air-fuel mixture.
2. What are the common symptoms of code P0158 in a 2017 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, rough idling, increased exhaust emissions, or a noticeable sulfur smell from the exhaust.
3. What causes the P0158 code to appear on a 2017 GMC Sierra?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, a short circuit, a rich-running engine, or issues with the engine control module (ECM).
4. Which oxygen sensor is Bank 2 Sensor 2 on a 2017 GMC Sierra?
Bank 2 Sensor 2 is the downstream oxygen sensor located after the catalytic converter on the side of the engine with cylinder 2.
5. Can a dirty air filter cause the P0158 code on a 2017 GMC Sierra?
While unlikely, a dirty air filter may indirectly contribute to a rich air-fuel mixture, which can lead to triggering the P0158 code.
6. How do you fix the P0158 code on a 2017 GMC Sierra?
Repairs may involve replacing the Bank 2 Sensor 2 oxygen sensor, repairing damaged wiring, fixing a short circuit, or addressing any issues causing the engine to run rich.
7. Can I drive my 2017 GMC Sierra with the P0158 code?
Driving with this code is not recommended as it may lead to poor performance, increased emissions, and potential damage to the catalytic converter.
8. How can I diagnose the P0158 code on a 2017 GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the oxygen sensor and its wiring for damage, check for exhaust leaks, and monitor real-time sensor data to verify functionality.
9. Is the P0158 code covered under warranty for a 2017 GMC Sierra?
It depends on the vehicle's warranty terms, but emissions-related components like oxygen sensors may be covered under an emissions warranty.
10. How much does it cost to repair the P0158 code on a 2017 GMC Sierra?
Repair costs can vary, but replacing an oxygen sensor typically ranges from $150 to $300, including parts and labor. Wiring repairs or other fixes may increase the cost.
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