AutoCodes – Generic – C1864

C1864 Code - Battery Module Fault

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Battery Module. Common causes include Faulty Battery Module, Battery Module harness is open or shorted, Battery 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: C1864 indicates Battery Module Fault.
Common causes: Common causes include Faulty Battery Module, Battery Module harness is open or shorted, Battery 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.

Save to My Repairs My Repairs

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

Code Popularity 5,403

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 Dec 03, 2020

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 C1864 Description

The Anti-Lock Brake System (ABS) Module monitors the Battery Module. The ABS Module sets the OBDII code when the Battery Module is not to factory specifications.

OBDII Code C1864 - Battery Module Fault - AutoCodes.com — C1864 Code - Battery Module Fault

What does this mean?

What are the Possible Causes of the DTC C1864?

Faulty Battery Module
Battery Module harness is open or shorted
Battery Module circuit poor electrical connection

How to Fix the DTC C1864?

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 C1864 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 C1864 code?

Need more information on how to fix the C1864 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1864 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 C1864 Code

1. What are the common symptoms of OBDII code C1864 (Battery Module Fault)?

- Common symptoms include issues with starting the vehicle, dimming headlights, and warning lights related to the battery system.

2. What can cause the OBDII code C1864 (Battery Module Fault) to trigger?

- The code may be triggered by a faulty battery module, damaged wiring, or issues with the battery management system.

3. How serious is the OBDII code C1864 (Battery Module Fault)?

- This code indicates a problem with the battery module, which can affect the vehicle's electrical system and overall performance. It is important to address this issue promptly.

4. How should I diagnose the OBDII code C1864 (Battery Module Fault)?

- Diagnosing this code typically involves checking the battery module, inspecting the wiring, and using a scan tool to gather data from the vehicle's onboard computer.

5. Can I still drive my vehicle with the OBDII code C1864 (Battery Module Fault) present?

- It is not recommended to drive the vehicle with this code active, as it can lead to potential electrical issues and affect the vehicle's performance.

6. What are some repair tips for fixing the OBDII code C1864 (Battery Module Fault)?

- Repair tips may include replacing the faulty battery module, repairing damaged wiring, resetting the battery management system, or seeking assistance from a professional mechanic.

7. How much does it typically cost to repair the OBDII code C1864 (Battery Module Fault)?

- The cost of repair can vary depending on the extent of the issue, parts needed, and labor costs. It is advisable to get a diagnostic and repair estimate from a reputable auto repair shop.

8. Can a DIY enthusiast fix the OBDII code C1864 (Battery Module Fault) themselves?

- While some experienced DIY enthusiasts may be able to address this issue, it is recommended to have the problem diagnosed and repaired by a qualified mechanic to ensure proper resolution.

9. What are the long-term effects of ignoring the OBDII code C1864 (Battery Module Fault)?

- Ignoring this code can lead to further electrical system damage, reduced battery life, and potential safety hazards while driving. It is important to address the issue promptly.

10. Is the OBDII code C1864 (Battery Module Fault) a common issue in certain vehicle makes and models?

- This code may be more prevalent in vehicles with advanced battery management systems or hybrid/electric vehicles that rely heavily on battery modules for operation.