AutoCodes – Generic – P22B5

P22B5 Code - O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open

Quick Answer

The engine aftertreatment system monitors the oxygen content in the exhaust. Common causes include Faulty O2 Sensor Bank 1 Sensor 2, O2 Sensor Bank 1 Sensor 2 harness is open or shorted, O2 Sensor Bank 1 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: P22B5 indicates O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open.
Common causes: Common causes include Faulty O2 Sensor Bank 1 Sensor 2, O2 Sensor Bank 1 Sensor 2 harness is open or shorted, O2 Sensor Bank 1 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 1,697

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 20, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P22B5 Description

The engine aftertreatment system monitors the oxygen content in the exhaust. The Powertrain Control Module (PCM) monitors the exhaust gases for oxygen content and varies the fuel injector on time to control the intake air-fuel mixture. These diagnostic checks to make sure that the oxygen content matches the expected oxygen content for the engine operating conditions. The PCM will set the fault if it detects that the actual oxygen level measurement does not match the expected value. The PCM will illuminate the MIL lamp immediately when the diagnostic runs and fails. The PCM will turn off the MIL lamp diagnostic runs and passes in four consecutive drive cycles. The PCM will set the Diagnostic Trouble Code (DTC) if it receives an FMI (Failure Mode Indicator) message from the Smart O2 Sensor Module.

OBDII Code P22B5 - O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open - AutoCodes.com — P22B5 Code - O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open

What does this mean?

What are the Possible Causes of the DTC P22B5?

Faulty O2 Sensor Bank 1 Sensor 2
O2 Sensor Bank 1 Sensor 2 harness is open or shorted
O2 Sensor Bank 1 Sensor 2 circuit poor electrical connection
Faulty Smart Oxygen Sensor Module

How to Fix the DTC P22B5?

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 P22B5 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 P22B5 code?

Need more information on how to fix the P22B5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P22B5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P22B5 Dodge — O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open
P22B5 RAM — O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open

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 P22B5 Code

1. What are common symptoms of OBDII code P22B5?

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

2. What does the OBDII code P22B5 indicate?

- The code P22B5 specifically points to an issue with the O2 sensor bank 1 sensor 2 pump cell current trim circuit being open.

3. What are possible causes of OBDII code P22B5?

- Possible causes include a faulty O2 sensor, damaged wiring or connectors, a malfunctioning PCM (powertrain control module), or a blown fuse related to the sensor circuit.

4. How can I diagnose the issue related to code P22B5?

- Diagnosis typically involves using an OBDII scanner to read the code, checking the wiring and connectors for any visible damage, and testing the O2 sensor for proper functioning.

5. Can I drive my vehicle with OBDII code P22B5?

- It is not recommended to continue driving with this code as it can lead to further damage to the vehicle and may cause safety concerns.

6. How do I repair OBDII code P22B5?

- Repairing this code often involves replacing the faulty O2 sensor, repairing or replacing damaged wiring or connectors, resetting the PCM, and clearing the trouble code.

7. Is it possible to reset OBDII code P22B5 without repairing the issue?

- While clearing the code may temporarily turn off the check engine light, it is crucial to address the underlying problem to prevent further issues.

8. Can a DIY enthusiast fix OBDII code P22B5?

- Depending on their skill level, a DIY enthusiast may be able to replace the O2 sensor or check the wiring, but more complex issues may require professional assistance.

9. What should I do if OBDII code P22B5 keeps coming back after repairs?

- If the code persists after repairs, recheck the O2 sensor, wiring, and connectors for any overlooked issues, or consult a mechanic for further diagnostic assistance.

10. How can I prevent OBDII code P22B5 from occurring in the future?

- To prevent this code, ensure regular maintenance of your vehicle, promptly address any check engine light warnings, and avoid driving with known sensor or circuit issues.