AutoCodes – Chevrolet – P0155 2015 Chevrolet Silverado

P0155 2015 Chevrolet Silverado Code - HO2S Heater Performance Bank 2 Sensor 1

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 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: P0155 2015 Chevrolet Silverado indicates HO2S Heater Performance Bank 2 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 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 399

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 Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0155 2015 Chevrolet Silverado Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S 1 heater current is out of factory specifications.

OBDII Code P0155 2015 Chevrolet Silverado - HO2S Heater Performance Bank 2 Sensor 1 - AutoCodes.com — P0155 2015 Chevrolet Silverado Code - HO2S Heater Performance Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0155 2015 Chevrolet Silverado?

Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 2 Sensor 1 circuit fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0155 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

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0155 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 P0155 2015 Chevrolet Silverado Code

1. What does the OBDII code P0155 for a 2015 Chevrolet Silverado indicate?

The code P0155 refers to a malfunction in the HO2S (Heated Oxygen Sensor) Heater Performance for Bank 2 Sensor 1 in a 2015 Chevrolet Silverado.

2. What are the common symptoms of a P0155 error code in a 2015 Chevrolet Silverado?

Common symptoms of a P0155 code may include poor fuel economy, rough idling, engine misfires, and an illuminated check engine light on the dashboard.

3. What are the possible causes of a P0155 code in a 2015 Chevrolet Silverado?

Potential causes of a P0155 code include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the vehicle's engine control module.

4. How can I diagnose a P0155 code in my 2015 Chevrolet Silverado?

Diagnosing a P0155 code involves using an OBDII scanner to retrieve the specific fault code, checking the oxygen sensor's wiring and connections, testing the sensor's heater circuit, and inspecting related components for damage.

5. Can I continue driving my 2015 Chevrolet Silverado with a P0155 error code?

It is not recommended to drive your vehicle with a P0155 code unresolved, as it can lead to decreased fuel efficiency and potential engine performance issues.

6. How can I repair a P0155 error code in my 2015 Chevrolet Silverado?

Repairing a P0155 code typically involves replacing the faulty oxygen sensor, repairing damaged wiring or connectors, checking and replacing fuses if necessary, and clearing the error code with an OBDII scanner.

7. Is it possible to prevent the recurrence of a P0155 code in my 2015 Chevrolet Silverado?

Regular maintenance, such as checking and replacing oxygen sensors according to the manufacturer's recommended intervals, can help prevent the recurrence of a P0155 code in your Chevrolet Silverado.

8. How long does it take to repair a P0155 code in a 2015 Chevrolet Silverado?

The time required to repair a P0155 code can vary depending on the exact cause of the issue, but it typically takes a few hours to diagnose and resolve the problem.

9. Can a DIY enthusiast repair a P0155 code in a 2015 Chevrolet Silverado?

While some aspects of diagnosing and repairing a P0155 code may be suitable for DIY enthusiasts, it is recommended to seek professional help for accurate diagnosis and proper repair to ensure the issue is resolved effectively.

10. Will resetting the check engine light resolve a P0155 code in a 2015 Chevrolet Silverado?

Simply resetting the check engine light without addressing the underlying issue causing the P0155 code will not resolve the problem. It is crucial to diagnose the root cause and perform the necessary repairs to clear the error code permanently.