AutoCodes – Generic – B22A9

B22A9 Code - ECU Internal Performance Radio Frequency Module

Quick Answer

The Radio Frequency Hub (RF-HUB) performs an internal self test. Common causes include Faulty Radio Frequency Hub (RF-HUB) Module, Radio Frequency Hub (RF-HUB) Module harness is open or shorted, Radio Frequency Hub (RF-HUB) Module 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: B22A9 indicates ECU Internal Performance Radio Frequency Module.
Common causes: Common causes include Faulty Radio Frequency Hub (RF-HUB) Module, Radio Frequency Hub (RF-HUB) Module harness is open or shorted, Radio Frequency Hub (RF-HUB) Module 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 8,007

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 Oct 31, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B22A9 Description

The Radio Frequency Hub (RF-HUB) performs an internal self test. The repair of this fault condition does not involve any external circuitry and centers on verifying the integrity of the internal circuitry and software validity.

OBDII Code B22A9 - ECU Internal Performance Radio Frequency Module - AutoCodes.com — B22A9 Code - ECU Internal Performance Radio Frequency Module

What does this mean?

What are the Possible Causes of the DTC B22A9?

Faulty Radio Frequency Hub (RF-HUB) Module
Radio Frequency Hub (RF-HUB) Module harness is open or shorted
Radio Frequency Hub (RF-HUB) Module circuit poor electrical connection

How to Fix the DTC B22A9?

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 B22A9 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 B22A9 code?

Need more information on how to fix the B22A9 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B22A9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B22A9 Chrysler — ECU Internal Performance Radio Frequency Module
B22A9 Dodge — ECU Internal Performance Radio Frequency Module
B22A9 Jeep — ECU Internal Performance Radio Frequency Module
B22A9 RAM — ECU Internal Performance Radio Frequency Module

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 B22A9 Code

1. What does the OBDII code B22A9 mean?

The code B22A9 indicates an internal performance issue with the Radio Frequency Module (RFM) in the ECU, which manages keyless entry and other remote communication functions.

2. What are the common symptoms of code B22A9?

Common symptoms include keyless entry failure, issues with remote start, or intermittent problems with locking and unlocking the vehicle.

3. What causes the B22A9 code to appear?

This code is typically caused by a malfunctioning Radio Frequency Module, software glitches, damaged wiring, or a failing ECU.

4. Can a drained car battery trigger the B22A9 code?

Yes, a low or drained battery can disrupt the RFMâ€™s performance and potentially lead to this code being stored.

5. How is the B22A9 code diagnosed?

A technician will use a diagnostic scanner to confirm the code, inspect the RFM, check for wiring or connector damage, and ensure the ECU is functioning properly.

6. Can I still drive my car with the B22A9 code active?

Yes, the vehicle is typically drivable, but features like keyless entry or remote start may not function correctly until the issue is resolved.

7. How do you fix the B22A9 code?

Repairs may involve updating or reprogramming the ECU, replacing the Radio Frequency Module, repairing damaged wiring, or clearing the code after addressing the root cause.

8. Is the B22A9 code a common issue?

This code is not very common but can occur in vehicles with advanced keyless entry and remote systems, particularly if thereâ€™s wear or electrical interference.

9. How much does it cost to fix the B22A9 code?

Repair costs can range from $150 to $800, depending on whether the issue requires reprogramming, module replacement, or wiring repairs.

10. Can I prevent the B22A9 code from recurring?

You can reduce the likelihood by maintaining the electrical system, avoiding frequent disconnection of the battery, and ensuring the RFM and ECU have updated software.