AutoCodes – Dodge – B1A8A Dodge

B1A8A Dodge Code - Multi-Module VIN Handshake Failure

Quick Answer

The Radio Frequency Hub (RF Hub) receives and monitors the VIN messages from the Powertrain Control Module (PCM) and the Body Control Module (BCM). Common causes include Faulty Radio Frequency Hub (RF Hub), Faulty Powertrain Control Module (PCM), Faulty Body Control Module (BCM). 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: B1A8A Dodge indicates Multi-Module VIN Handshake Failure.
Common causes: Common causes include Faulty Radio Frequency Hub (RF Hub), Faulty Powertrain Control Module (PCM), Faulty Body Control Module (BCM).
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,981

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 Aug 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1A8A Dodge Description

The Radio Frequency Hub (RF Hub) receives and monitors the VIN messages from the Powertrain Control Module (PCM) and the Body Control Module (BCM). If the VIN is different from the last Vehicle Identification Number (VIN) it received, it will set this code. If the module was used on a previous vehicle, the VIN will be set to that vehicle.

OBDII Code B1A8A Dodge - Multi-Module VIN Handshake Failure - AutoCodes.com — B1A8A Dodge Code - Multi-Module VIN Handshake Failure

What does this mean?

What are the Possible Causes of the DTC B1A8A Dodge?

Faulty Radio Frequency Hub (RF Hub)
Faulty Powertrain Control Module (PCM)
Faulty Body Control Module (BCM)
RF HUB, BCM OR PCM Not Programmed

How to Fix the DTC B1A8A Dodge?

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 B1A8A Dodge 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 B1A8A Dodge code?

Need more information on how to fix the B1A8A Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1A8A Dodge 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 B1A8A Dodge Code

What does the OBDII code B1A8A mean for a Dodge vehicle?

The OBDII code B1A8A indicates a Multi-Module VIN Handshake Failure, meaning there is a communication issue between control modules in the vehicle regarding the Vehicle Identification Number (VIN).

What are common symptoms of the B1A8A code?

Common symptoms may include warning lights on the dashboard, malfunctioning features such as cruise control or stability assistance, and issues with vehicle systems that depend on multiple modules working together.

What causes the B1A8A code to trigger?

The code can be triggered by issues such as improper VIN programming, faulty control modules, corrupted software, or poor electrical connections between modules.

How can I diagnose the B1A8A code?

To diagnose the B1A8A code, use an OBDII scanner to confirm the code and check for related codes. Inspect wiring and connectors between modules and verify that the VIN is correctly programmed in all relevant modules.

What are some common repair tips for fixing the B1A8A code?

Repair tips include ensuring all control modules have the correct VIN programmed, checking for and repairing any damaged wiring or poor connections, and updating software in the modules if necessary.

Can a dead battery cause the B1A8A code?

Yes, a dead or weak battery can cause voltage issues that may lead to communication failures between modules, potentially triggering the B1A8A code.

Is it safe to drive a vehicle with the B1A8A code?

While it may not pose immediate danger, it is advisable to address the issue as it can affect vehicle performance and safety features.

How do I reset the B1A8A code after repairs?

After repairs, you can reset the B1A8A code using an OBDII scanner that has the capability to clear codes. However, ensure all issues are resolved before doing so.

Can I fix the B1A8A code myself?

If you have experience with vehicle electronics and diagnostics, you may be able to address the issue yourself. However, if you're unfamiliar with automotive repair, it's best to consult a professional mechanic.