AutoCodes – Chevrolet – P0158 2015 Chevrolet Silverado

P0158 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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.

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Code Popularity 934

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 27, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0158 2015 Chevrolet Silverado Description

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the Engine Control Module (ECM) operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0 - 1, 000 mV. Once sufficient HO2S voltage fluctuation is observed by the ECM, Closed Loop is entered. The ECM uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1, 000 mV indicates a rich fuel mixture. An HO2S voltage that decreases toward 0 mV indicates a lean fuel mixture.
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.

OBDII Code P0158 2015 Chevrolet Silverado - HO2S Circuit High Voltage Bank 2 Sensor 2 - AutoCodes.com — P0158 2015 Chevrolet Silverado Code - HO2S Circuit High Voltage Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0158 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

Replacing the Rear Heated Oxygen Sensor (HO2S) Bank 2 usually takes care of the problem.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0158 2015 Chevrolet Silverado 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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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 P0158 2015 Chevrolet Silverado Code

1. What does the OBDII code P0158 mean on a 2015 Chevrolet Silverado?

P0158 indicates that the oxygen sensor (HO2S) located on Bank 2 Sensor 2 is detecting a high voltage, which usually means an overly rich air-fuel mixture.

2. What are the symptoms of code P0158 on a 2015 Chevrolet Silverado?

Common symptoms include poor fuel economy, rough idling, black smoke from the exhaust, and the check engine light being illuminated.

3. What causes the P0158 code to appear on a 2015 Chevrolet Silverado?

Possible causes include a faulty oxygen sensor, damaged wiring or connectors, a short to voltage in the HO2S circuit, or issues with the engine running too rich.

4. How do I diagnose the P0158 code on a 2015 Chevrolet Silverado?

Start by inspecting the wiring and connectors for damage or corrosion, test the oxygen sensor with a multimeter, and check for any exhaust leaks or high fuel pressure.

5. Can a faulty oxygen sensor cause the P0158 code on a 2015 Chevrolet Silverado?

Yes, a faulty oxygen sensor can cause the code if it sends incorrect high voltage signals to the engine control module (ECM).

6. Is it safe to drive my 2015 Chevrolet Silverado with the P0158 code?

Driving with this code may be possible in the short term, but it can lead to poor fuel economy and potential damage to the catalytic converter if ignored.

7. How do I fix the P0158 code on a 2015 Chevrolet Silverado?

Repairs may include replacing the faulty oxygen sensor, repairing or replacing damaged wiring, fixing exhaust leaks, or addressing issues causing an overly rich air-fuel mixture.

8. Which sensor is Bank 2 Sensor 2 on a 2015 Chevrolet Silverado?

Bank 2 Sensor 2 is the oxygen sensor located downstream of the catalytic converter on the side of the engine with cylinder 2.

9. How much does it cost to repair the P0158 code on a 2015 Chevrolet Silverado?

The repair cost depends on the issue, but replacing an oxygen sensor typically costs $150 to $350, including parts and labor.

10. Can a clogged catalytic converter cause the P0158 code on a 2015 Chevrolet Silverado?

A clogged catalytic converter is unlikely to directly cause this code, but it might contribute to an overly rich air-fuel mixture, indirectly triggering the issue.