AutoCodes – Chevrolet – P22B6 2017 Chevrolet Silverado

P22B6 2017 Chevrolet Silverado Code - HO2S Pump Current Trim Circuit Low Voltage Sensor 2

Quick Answer

The oxygen content of the exhaust is measured via the nitrogen oxide (NOx) sensors. Common causes include Faulty Nitrogen Oxide (NOx) Sensor 2, Nitrogen Oxide Sensor 2 harness is open or shorted, Nitrogen Oxide Sensor 2 circuit poor electrical connection. 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 Chevrolet Silverado indicates HO2S Pump Current Trim Circuit Low Voltage Sensor 2.
Common causes: Common causes include Faulty Nitrogen Oxide (NOx) Sensor 2, Nitrogen Oxide Sensor 2 harness is open or shorted, Nitrogen Oxide Sensor 2 circuit poor electrical connection.
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.

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Code Popularity 322

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P22B6 2017 Chevrolet Silverado Description

The oxygen content of the exhaust is measured via the nitrogen oxide (NOx) sensors. The nitrogen oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. There are two NOx sensors, one placed upstream of selective catalytic reduction, to measure inlet NOx concentration, and one placed downstream. They are connected with the control module via CAN and all the information is exchanged through it. Since it is a smart sensor, all the electrical monitoring is performed inside the sensor and only the results are sent to the ECM. Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust. The ECM varies the amount of diesel exhaust fluid (reductant) added by varying the reductant injector duty cycle in response to changes in engine exhaust NOx levels. The smart NOx sensors consist of two components, the NOx module and the NOx sensor element that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module. The Diagnostic Trouble Code (DTC) will be set when the NOx sensor module detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor.

OBDII Code P22B6 2017 Chevrolet Silverado - HO2S Pump Current Trim Circuit Low Voltage Sensor 2 - AutoCodes.com — P22B6 2017 Chevrolet Silverado Code - HO2S Pump Current Trim Circuit Low Voltage Sensor 2

What does this mean?

What are the Possible Causes of the DTC P22B6 2017 Chevrolet Silverado?

Faulty Nitrogen Oxide (NOx) Sensor 2
Nitrogen Oxide Sensor 2 harness is open or shorted
Nitrogen Oxide Sensor 2 circuit poor electrical connection

How to Fix the DTC P22B6 2017 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P22B6 2017 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.

Need more information about the P22B6 2017 Chevrolet Silverado code?

Need more information on how to fix the P22B6 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P22B6 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P22B6 in a 2017 Chevrolet Silverado?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P22B6 "HO2S Pump Current Trim Circuit Low Voltage Sensor 2" mean for a 2017 Chevrolet Silverado?

- This code indicates that there is a low voltage condition in the circuit related to the oxygen sensor 2 pump current trim in the Silverado's exhaust system.

3. What are the possible causes of OBDII code P22B6 in a 2017 Chevrolet Silverado?

- Potential causes include a faulty oxygen sensor, damaged wiring or connectors, a malfunctioning oxygen sensor heater, or issues with the engine control module.

4. How can I diagnose the OBDII code P22B6 in my 2017 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the trouble code, inspecting the oxygen sensor and related components, and testing the wiring for continuity and voltage.

5. Is it safe to continue driving my 2017 Chevrolet Silverado with the P22B6 trouble code?

- It is generally not recommended to drive the vehicle with this code present, as it can lead to further damage to the engine and emissions system. It's best to address the issue promptly.

6. Can I repair the OBDII code P22B6 in my 2017 Chevrolet Silverado myself?

- While some DIY enthusiasts may be able to address this issue, it is recommended to have a professional mechanic diagnose and repair the problem to ensure it is properly resolved.

7. Are there any simple tips for fixing the P22B6 code in a 2017 Chevrolet Silverado?

- Simple tips include checking and tightening the oxygen sensor connections, inspecting the wiring for damage, and ensuring all components related to the oxygen sensor are functioning correctly.

8. Will resetting the check engine light make the P22B6 code go away in my 2017 Chevrolet Silverado?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the P22B6 code is not addressed, the light is likely to come back on.

9. How much does it typically cost to repair the P22B6 code in a 2017 Chevrolet Silverado?

- The cost of repair can vary depending on the specific cause of the code and the labor rates in your area. It is advisable to get a few quotes from different repair shops.

10. Can the OBDII code P22B6 in a 2017 Chevrolet Silverado affect the vehicle's emissions or overall performance?

- Yes, this code can impact emissions levels and the overall performance of the vehicle, as it relates to the operation of the oxygen sensor in the exhaust system.