AutoCodes – Chevrolet – P0155 2016 Chevrolet Silverado

P0155 2016 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 2016 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 456

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 2016 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 2016 Chevrolet Silverado - HO2S Heater Performance Bank 2 Sensor 1 - AutoCodes.com — P0155 2016 Chevrolet Silverado Code - HO2S Heater Performance Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0155 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code

1. What does the OBDII code P0155 on a 2016 Chevrolet Silverado mean?

The code P0155 for a 2016 Chevrolet Silverado refers to a fault in the Heated Oxygen Sensor (HO2S) Heater Performance for Bank 2 Sensor 1.

2. What are the common symptoms of a P0155 trouble code in a 2016 Chevrolet Silverado?

Common symptoms of a P0155 code in a 2016 Chevrolet Silverado may include poor fuel economy, rough idling, engine misfires, or a Check Engine light illuminated on the dashboard.

3. What are the possible causes of a P0155 trouble code in a 2016 Chevrolet Silverado?

The P0155 code in a 2016 Chevrolet Silverado can be triggered by issues such as a faulty oxygen sensor, damaged wiring, a blown fuse, or a problem with the engine control module (ECM).

4. How can I diagnose a P0155 trouble code in my 2016 Chevrolet Silverado?

To diagnose a P0155 code in a 2016 Chevrolet Silverado, you may need to use an OBDII scanner to retrieve the code, inspect the oxygen sensor and related wiring, check the fuse, and test the heater circuit.

5. Can I still drive my 2016 Chevrolet Silverado with a P0155 trouble code?

It is not recommended to drive your 2016 Chevrolet Silverado with a P0155 code for an extended period as it can lead to poor engine performance and potential damage. It's best to address the issue promptly.

6. How do I repair a P0155 trouble code in a 2016 Chevrolet Silverado?

Repairing a P0155 code in a 2016 Chevrolet Silverado may involve replacing the Bank 2 Sensor 1 oxygen sensor, repairing damaged wiring, checking and replacing fuses if necessary, or addressing any ECM issues.

7. Are there any DIY tips for fixing a P0155 trouble code in a 2016 Chevrolet Silverado?

While some may attempt to replace the oxygen sensor themselves, it is recommended to have a professional mechanic diagnose and repair the P0155 code in a 2016 Chevrolet Silverado to ensure proper resolution.

8. How much does it typically cost to fix a P0155 trouble code in a 2016 Chevrolet Silverado?

The cost of fixing a P0155 code in a 2016 Chevrolet Silverado can vary depending on the exact cause of the issue, but it may range from $100 to $300 or more for parts and labor.

9. What happens if I ignore a P0155 trouble code in my 2016 Chevrolet Silverado?

Ignoring a P0155 code in a 2016 Chevrolet Silverado can lead to decreased fuel efficiency, potential engine damage, and emissions issues. It's important to address the problem promptly.

10. How long does it take to repair a P0155 trouble code in a 2016 Chevrolet Silverado?

The time needed to repair a P0155 code in a 2016 Chevrolet Silverado can vary based on the exact cause of the issue and the availability of parts. It may take a few hours to a full day for diagnosis and repair.