AutoCodes – Chrysler – B21F8 Chrysler

B21F8 Chrysler Code - Exterior Lighting Power Supply Input 1 Circuit Open

Quick Answer

The Body Control Module (BCM) monitors the Exterior Lighting Power Supply Input 1 Circuit. Common causes include Blown Exterior Lighting Fuse, Exterior Lighting Fuse harness is open or shorted, Exterior Lighting Fuse 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: B21F8 Chrysler indicates Exterior Lighting Power Supply Input 1 Circuit Open.
Common causes: Common causes include Blown Exterior Lighting Fuse, Exterior Lighting Fuse harness is open or shorted, Exterior Lighting Fuse 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 651

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 30, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B21F8 Chrysler Description

The Body Control Module (BCM) monitors the Exterior Lighting Power Supply Input 1 Circuit. The BCM sets the OBDII code when it detects less than 1.0 volt on the Fused B(+) circuit.

OBDII Code B21F8 Chrysler - Exterior Lighting Power Supply Input 1 Circuit Open - AutoCodes.com — B21F8 Chrysler Code - Exterior Lighting Power Supply Input 1 Circuit Open

What does this mean?

What are the Possible Causes of the DTC B21F8 Chrysler?

Blown Exterior Lighting Fuse
Exterior Lighting Fuse harness is open or shorted
Exterior Lighting Fuse circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B21F8 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 B21F8 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.

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Need Help with the Code?

Get the B21F8 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 B21F8 Chrysler Code

1. What are common symptoms of OBDII code B21F8 Chrysler?

- Common symptoms include exterior lighting not functioning properly, flickering lights, or complete loss of exterior lighting.

2. What does the OBDII code B21F8 Chrysler indicate?

- The code indicates a circuit open issue in the power supply input 1 for exterior lighting.

3. What are the possible causes of the Exterior Lighting Power Supply Input 1 Circuit Open code?

- Possible causes include damaged wiring, a faulty lighting control module, a blown fuse, or a loose connection in the lighting system.

4. How can I diagnose the issue related to OBDII code B21F8 Chrysler?

- You can start by visually inspecting the wiring and connections in the exterior lighting system. Using a multimeter to test for continuity and voltage can help pinpoint the problem.

5. Is it safe to drive with the Exterior Lighting Power Supply Input 1 Circuit Open code?

- It is not recommended to drive with this code active, as it can affect your visibility to other drivers and compromise your safety on the road.

6. Can I repair the Exterior Lighting Power Supply Input 1 Circuit Open issue myself?

- If you have experience with automotive electrical systems, you may be able to repair the issue yourself. However, it is recommended to consult a professional technician for proper diagnosis and repair.

7. How much does it typically cost to repair the OBDII code B21F8 Chrysler?

- The cost of repair can vary depending on the exact cause of the issue. It may range from a simple fix like replacing a fuse to more complex repairs involving the lighting control module.

8. Will resetting the OBDII code B21F8 Chrysler make the problem go away?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the Exterior Lighting Power Supply Input 1 Circuit Open code.

9. Can extreme weather conditions cause the OBDII code B21F8 Chrysler to trigger?

- Yes, extreme weather conditions such as heavy rain or snow can potentially expose weaknesses in the exterior lighting system and lead to circuit open faults.

10. How can I prevent the recurrence of the Exterior Lighting Power Supply Input 1 Circuit Open code?

- Regularly inspecting and maintaining the exterior lighting system, including checking for loose connections and worn-out wiring, can help prevent the code from reoccurring.