AutoCodes – Generic – P022B

P022B Code - Charge Air Cooler Bypass Control 'A' Circuit Low

Quick Answer

The Powertrain Control Module (PCM) controls and monitors the Charge Air Cooler Bypass Control Valve which controls airflow through the charge air cooler. Common causes include Faulty Air Cooler Bypass Control Valve, Air Cooler Bypass Control Valve harness is open or shorted, Air Cooler Bypass Control Valve 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: P022B indicates Charge Air Cooler Bypass Control 'A' Circuit Low.
Common causes: Common causes include Faulty Air Cooler Bypass Control Valve, Air Cooler Bypass Control Valve harness is open or shorted, Air Cooler Bypass Control Valve 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 5,026

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 Apr 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P022B Description

The Powertrain Control Module (PCM) controls and monitors the Charge Air Cooler Bypass Control Valve which controls airflow through the charge air cooler. The PCM sets the OBDII code when the Charge Air Cooler Bypass Control Valve stops working to the PCM signal.

OBDII Code P022B - Charge Air Cooler Bypass Control 'A' Circuit Low - AutoCodes.com — P022B Code - Charge Air Cooler Bypass Control 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P022B?

Faulty Air Cooler Bypass Control Valve
Air Cooler Bypass Control Valve harness is open or shorted
Air Cooler Bypass Control Valve circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P022B?

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 P022B 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 P022B code?

Need more information on how to fix the P022B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P022B 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 P022B Code

What does the OBDII code P022B mean?

P022B indicates an issue with the Charge Air Cooler Bypass Control 'A' Circuit, specifically that the circuit is registering a voltage lower than the expected range.

What are the symptoms of a P022B code?

Common symptoms include reduced engine performance, poor acceleration, decreased fuel efficiency, and the check engine light being illuminated.

What causes a P022B code?

Potential causes include a faulty charge air cooler bypass valve, damaged wiring or connectors in the circuit, a malfunctioning control module, or sensor failure.

Can I drive with a P022B code?

While driving with a P022B code may be possible, it is not recommended as it could lead to reduced engine performance or further damage to the engine or turbocharger system.

How is a P022B code diagnosed?

A technician will typically use an OBDII scanner to confirm the code, inspect the circuit's wiring and connections, test the bypass valve functionality, and check for related issues like vacuum leaks.

What repairs can fix the P022B code?

Common fixes include repairing or replacing damaged wiring, replacing the charge air cooler bypass valve, or addressing any issues with the control module.

How much does it cost to fix a P022B code?

Repair costs vary but may range from $100 to $500, depending on whether wiring repairs, valve replacement, or control module programming is needed.

Can a dirty air filter cause a P022B code?

While a dirty air filter is unlikely to directly cause this code, it can contribute to airflow issues that may exacerbate related problems.

How do I prevent a P022B code from recurring?

Regular maintenance, including inspecting wiring and connectors, ensuring the charge air cooler system is clean, and addressing any engine performance issues promptly, can help prevent this code from recurring.

Is a P022B code specific to certain vehicles?

No, the P022B code is a generic OBDII code, but its exact meaning and repair steps may vary slightly depending on the vehicle's make and model. Always consult your vehicle's service manual for specific guidance.