P0158 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code
What does OBDII code P0158 mean on a 2016 GMC Sierra?
P0158 indicates that the oxygen sensor (Bank 2, Sensor 2) is detecting a higher-than-expected voltage, which may indicate a problem with the sensor or related systems.
What are the symptoms of code P0158 on a 2016 GMC Sierra?
Common symptoms include decreased fuel efficiency, rough engine performance, check engine light illumination, and higher emissions.
What causes P0158 on a 2016 GMC Sierra?
Possible causes include a faulty oxygen sensor (Bank 2, Sensor 2), damaged wiring or connectors, exhaust system leaks, or issues with the engine control module (ECM).
How is P0158 diagnosed on a 2016 GMC Sierra?
Technicians typically use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, and test the oxygen sensor's performance using a multimeter or diagnostic tools.
Can I drive my 2016 GMC Sierra with code P0158?
While the vehicle may still be drivable, driving with this code can lead to poor fuel economy, increased emissions, and potential damage to the catalytic converter if left unresolved.
How do you fix code P0158 on a 2016 GMC Sierra?
Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, addressing exhaust leaks, or updating the ECM software if needed.
Is replacing the oxygen sensor the only solution for P0158?
Not always. While a faulty sensor is a common cause, you should inspect wiring, connectors, and exhaust systems to rule out other issues before replacement.
What is the location of Bank 2 Sensor 2 on a 2016 GMC Sierra?
Bank 2 refers to the side of the engine opposite the #1 cylinder, and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.
How much does it cost to fix code P0158 on a 2016 GMC Sierra?
Repair costs can range from $150 to $400, depending on whether the oxygen sensor, wiring, or other components need replacement.
Can a dirty or clogged catalytic converter cause code P0158?
Yes, a restricted catalytic converter can lead to abnormal exhaust flow and high voltage readings from the downstream oxygen sensor.
Discuss the causes and fixes for P0158 2016 GMC Sierra OBDII Code
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