AutoCodes – Chrysler – B1E21 Chrysler

B1E21 Chrysler Code - Backup Battery Circuit Voltage Below Threshold

Quick Answer

The Emergency Assistance Module (EAM) monitors the Backup Battery Circuit. Common causes include Faulty Backup Battery, Backup Battery harness is open or shorted, Backup Battery 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: B1E21 Chrysler indicates Backup Battery Circuit Voltage Below Threshold.
Common causes: Common causes include Faulty Backup Battery, Backup Battery harness is open or shorted, Backup Battery 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 698

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 Sep 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1E21 Chrysler Description

The Emergency Assistance Module (EAM) monitors the Backup Battery Circuit. The EAM sets the OBDII code when it detects a low backup battery.

OBDII Code B1E21 Chrysler - Backup Battery Circuit Voltage Below Threshold - AutoCodes.com — B1E21 Chrysler Code - Backup Battery Circuit Voltage Below Threshold

What does this mean?

What are the Possible Causes of the DTC B1E21 Chrysler?

Faulty Backup Battery
Backup Battery harness is open or shorted
Backup Battery circuit poor electrical connection
Faulty Emergency Assistance Module (EAM)

How to Fix the DTC B1E21 Chrysler?

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 B1E21 Chrysler 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 B1E21 Chrysler code?

Need more information on how to fix the B1E21 Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1E21 Chrysler 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 B1E21 Chrysler Code

1. What are the common symptoms of OBDII code B1E21 in a Chrysler vehicle?

The common symptoms of OBDII code B1E21 include the Check Engine light illuminating on the dashboard, issues with starting the vehicle, and potential loss of power steering assistance.

2. What does the OBDII code B1E21 Chrysler Backup Battery Circuit Voltage Below Threshold mean?

OBDII code B1E21 indicates that the backup battery circuit voltage in the Chrysler vehicle is below the acceptable threshold, which can affect the vehicle's electrical system.

3. What are some possible causes of OBDII code B1E21 in a Chrysler vehicle?

Possible causes of OBDII code B1E21 include a faulty backup battery, damaged wiring in the backup battery circuit, poor electrical connections, or issues with the backup battery module.

4. How can I diagnose OBDII code B1E21 in my Chrysler vehicle?

Diagnosing OBDII code B1E21 involves using an OBDII scanner to retrieve the code, inspecting the backup battery and related components for any visible damage, and testing the voltage in the backup battery circuit.

5. Is it safe to continue driving with OBDII code B1E21 present in my Chrysler vehicle?

It is not recommended to continue driving with OBDII code B1E21 present in your Chrysler vehicle as it can lead to potential electrical system failures and affect the overall performance of the vehicle.

6. How can I repair OBDII code B1E21 in my Chrysler vehicle?

Repairing OBDII code B1E21 may involve replacing the backup battery, repairing or replacing damaged wiring, ensuring proper electrical connections, or replacing the backup battery module as needed.

7. Can I reset OBDII code B1E21 in my Chrysler vehicle using a simple reset tool?

While you can attempt to clear the code using an OBDII reset tool, it is important to diagnose and address the underlying issue causing OBDII code B1E21 to prevent it from recurring.

8. What are the potential risks of ignoring OBDII code B1E21 in my Chrysler vehicle?

Ignoring OBDII code B1E21 can result in further damage to the vehicle's electrical system, potential safety hazards while driving, and increased repair costs over time.

9. How long does it typically take to repair OBDII code B1E21 in a Chrysler vehicle?

The time it takes to repair OBDII code B1E21 can vary depending on the specific cause of the issue, but it may range from a relatively quick fix to a more involved repair requiring professional assistance.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code B1E21 in a Chrysler vehicle?

Depending on the cause of OBDII code B1E21, a DIY enthusiast with basic automotive knowledge may be able to address simpler issues like checking and replacing the backup battery, but more complex repairs may require professional assistance.