AutoCodes – Chevrolet – P22B7 2014 Chevrolet Silverado

P22B7 2014 Chevrolet Silverado Code - HO2S Pump Current Trim Circuit High 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: P22B7 2014 Chevrolet Silverado indicates HO2S Pump Current Trim Circuit High 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 226

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 P22B7 2014 Chevrolet Silverado Description

The oxygen content of the exhaust is measured via the Nitrogen Oxide (NOx) sensors. The Nitrogen Oxide (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 the 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 P22B7 2014 Chevrolet Silverado - HO2S Pump Current Trim Circuit High Voltage Sensor 2 - AutoCodes.com — P22B7 2014 Chevrolet Silverado Code - HO2S Pump Current Trim Circuit High Voltage Sensor 2

What does this mean?

What are the Possible Causes of the DTC P22B7 2014 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 P22B7 2014 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 P22B7 2014 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 P22B7 2014 Chevrolet Silverado code?

Need more information on how to fix the P22B7 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P22B7 2014 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 P22B7 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P22B7 in a 2014 Chevrolet Silverado?

The common symptoms of code P22B7 include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P22B7 "HO2S Pump Current Trim Circuit High Voltage Sensor 2" mean in a 2014 Chevrolet Silverado?

The code P22B7 indicates an issue with the HO2S (Heated Oxygen Sensor) Pump Current Trim Circuit High Voltage Sensor 2 in a 2014 Chevrolet Silverado.

3. What are the possible causes of OBDII code P22B7 in a 2014 Chevrolet Silverado?

Possible causes of code P22B7 include a faulty HO2S sensor, issues with the wiring or connectors related to the sensor, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P22B7 in my 2014 Chevrolet Silverado?

Diagnosing code P22B7 typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the HO2S sensor and related components, and checking the wiring for any damage or loose connections.

5. Can I continue driving my 2014 Chevrolet Silverado with OBDII code P22B7?

It is not recommended to drive your vehicle with an unresolved P22B7 code, as it can lead to further engine damage and reduced fuel efficiency. It is best to address the issue promptly.

6. How can I repair OBDII code P22B7 in my 2014 Chevrolet Silverado?

Repairing code P22B7 may involve replacing the faulty HO2S sensor, repairing or replacing damaged wiring or connectors, and clearing the code with an OBDII scanner.

7. Is it possible to reset the OBDII code P22B7 in a 2014 Chevrolet Silverado without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

8. Can a DIY enthusiast fix OBDII code P22B7 in a 2014 Chevrolet Silverado?

Depending on your experience and tools available, some DIY enthusiasts may be able to address code P22B7 by replacing the HO2S sensor or fixing wiring issues. However, it's recommended to consult a professional if unsure.

9. How much does it typically cost to repair OBDII code P22B7 in a 2014 Chevrolet Silverado?

The cost of repairing code P22B7 can vary depending on the extent of the issue and the parts needed. Costs may include the price of a new HO2S sensor, wiring repairs, and labor charges if done by a mechanic.

10. How long does it take to repair OBDII code P22B7 in a 2014 Chevrolet Silverado?

The time needed to repair code P22B7 can vary based on the complexity of the issue and your experience level. It may take a few hours to a day for a mechanic to diagnose and fix the problem.