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Engine-Codes – GMC – P22B6 2017 GMC Sierra

P22B6 2017 GMC Sierra Code - HO2S Pump Current Trim Circuit Low Voltage Sensor 2

Quick Answer

The P22B6 diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to the HO2S (Heated Oxygen Sensor) Pump Current Trim Circuit Low Voltage Sensor 2. Common causes include Faulty HO2S pump, Wiring or connector issues in the HO2S pump circuit, ECM software or programming issues. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P22B6 2017 GMC Sierra indicates HO2S Pump Current Trim Circuit Low Voltage Sensor 2.
Common causes
Common causes include Faulty HO2S pump, Wiring or connector issues in the HO2S pump circuit, ECM software or programming issues.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code P22B6 2017 GMC Sierra Description

The P22B6 diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to the HO2S (Heated Oxygen Sensor) Pump Current Trim Circuit Low Voltage Sensor 2. This code indicates that there is a low voltage condition in the circuit that controls the current to the HO2S pump for sensor 2. The HO2S pump is responsible for maintaining the correct oxygen levels in the exhaust system by providing additional air to the sensor when needed.

OBDII Code P22B6 2017 GMC Sierra - HO2S Pump Current Trim Circuit Low Voltage Sensor 2
P22B6 2017 GMC Sierra Code - HO2S Pump Current Trim Circuit Low Voltage Sensor 2

Common Causes of P22B6 2017 GMC Sierra

  1. Faulty HO2S pump
  2. Wiring or connector issues in the HO2S pump circuit
  3. ECM software or programming issues
  4. Electrical system malfunctions
  5. Corrosion or damage to sensor components

Symptoms of P22B6 2017 GMC Sierra

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Hesitation or lack of power during acceleration
  4. Check Engine Light illuminated
  5. Failed emissions test

How to Fix P22B6 2017 GMC Sierra

  1. Diagnose the issue by using a scan tool to read the DTC and inspect the HO2S pump circuit for any visible damage.
  2. Test the HO2S pump for proper function and check the wiring and connectors for any signs of wear or corrosion.
  3. Replace the HO2S pump if it is found to be faulty, and repair or replace any damaged wiring or connectors.
  4. Clear the DTC from the ECM memory and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to pinpoint the exact cause of the low voltage condition.

Cost to Fix P22B6 2017 GMC Sierra

The typical repair costs for addressing a P22B6 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty HO2S pump and addressing any wiring or connector issues can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local shops for a more accurate estimate. Most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher at dealerships or in metropolitan areas. Independent shops may offer lower labor rates.

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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 P22B6 2017 GMC Sierra Code

1. What are common symptoms of OBDII code P22B6 in a 2017 GMC Sierra?

The common symptoms of OBDII code P22B6 in a 2017 GMC Sierra may include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 error code mean in a 2017 GMC Sierra?

The P22B6 code indicates that there is a low voltage condition detected in the oxygen sensor pump current trim circuit for sensor 2 in a 2017 GMC Sierra.

3. What are the possible causes of the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 fault code?

Possible causes of the P22B6 code in a 2017 GMC Sierra include a faulty oxygen sensor, issues with the wiring or connectors related to the sensor, or a malfunction in the sensor pump circuit.

4. How can I diagnose the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 issue in my 2017 GMC Sierra?

Diagnosing the P22B6 code involves using an OBDII scanner to retrieve the specific fault code, visually inspecting the oxygen sensor and related wiring, and performing tests to determine the cause of the low voltage condition.

5. Is it safe to continue driving my 2017 GMC Sierra with the P22B6 code present?

It is not recommended to continue driving your 2017 GMC Sierra with the P22B6 code present, as it can lead to further damage to the vehicle's engine and emissions system.

6. Can I repair the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 issue in my 2017 GMC Sierra myself?

Depending on your level of automotive knowledge and experience, you may be able to repair the P22B6 code issue yourself by replacing the faulty oxygen sensor, repairing wiring or connectors, or addressing any other identified causes.

7. How much does it typically cost to repair the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 problem in a 2017 GMC Sierra?

The cost of repairing the P22B6 code in a 2017 GMC Sierra can vary depending on the specific cause of the issue, but it may involve expenses for parts and labor at a repair shop or dealership.

8. Will resetting the check engine light resolve the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 error code?

Simply resetting the check engine light will not fix the underlying issue causing the P22B6 code in a 2017 GMC Sierra. It is important to diagnose and repair the root cause of the problem to prevent it from reoccurring.

9. How can I prevent the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 code from reappearing in my 2017 GMC Sierra?

Regular vehicle maintenance, such as inspecting and replacing oxygen sensors as recommended, checking wiring connections, and addressing any engine performance issues promptly, can help prevent the recurrence of the P22B6 fault code.

10. Is the HO2S Pump Current Trim Circuit Low Voltage Sensor 2 issue covered under warranty for a 2017 GMC Sierra?

If your 2017 GMC Sierra is still within the warranty period, the repair for the P22B6 code may be covered under warranty, depending on the terms and conditions specified by the manufacturer. It is advisable to check with your dealership for more information.

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