AutoCodes – Generic – B2101

B2101 Code - Head Rest Switch Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Head Rest Switch. Common causes include Faulty Head Rest Switch, Head Rest Switch harness is open or shorted, Head Rest Switch 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: B2101 indicates Head Rest Switch Circuit Failure.
Common causes: Common causes include Faulty Head Rest Switch, Head Rest Switch harness is open or shorted, Head Rest Switch 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 6,488

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 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2101 Description

The Body Control Module (BCM) monitors the Head Rest Switch. The BCM sets the OBDII code when the Head Rest Switch is not to factory specifications.

OBDII Code B2101 - Head Rest Switch Circuit Failure - AutoCodes.com — B2101 Code - Head Rest Switch Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B2101?

Faulty Head Rest Switch
Head Rest Switch harness is open or shorted
Head Rest Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2101?

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 B2101 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 B2101 code?

Need more information on how to fix the B2101 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2101 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2101 Buick — Power Seat Switch Shorted
B2101 Cadillac — Power Seat Switch Shorted
B2101 Chevrolet — Power Seat Switch Shorted
B2101 Chrysler — Ignition Run/Start Input Circuit Low
B2101 Dodge — Ignition Run/Start Input Circuit Low
B2101 GMC — Power Seat Switch Shorted
B2101 Jeep — Ignition Run/Start Input Circuit Low
B2101 RAM — Ignition Run/Start Input Circuit Low

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 B2101 Code

1. What are the common symptoms of OBDII code B2101 (Head Rest Switch Circuit Failure)?

- The common symptoms include non-functioning head rest adjustment controls, illuminated warning lights on the dashboard, and possible issues with other electronics in the vehicle.

2. What are the possible causes of the B2101 trouble code?

- The code B2101 can be triggered by a faulty head rest switch, damaged wiring or connectors in the circuit, or a malfunction in the head rest control module.

3. How can I diagnose the B2101 code related to head rest switch circuit failure?

- To diagnose the issue, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the head rest switch and its wiring for any visible damage, and perform continuity tests on the circuit components.

4. What are some repair tips for addressing the B2101 trouble code?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the faulty head rest switch, and resetting the trouble codes after the repair to see if the issue has been resolved.

5. Can I continue driving my vehicle with the B2101 trouble code?

- It is generally safe to drive the vehicle with the B2101 trouble code, but it is recommended to address the issue promptly to prevent any further electrical problems or potential safety hazards.

6. Is it possible to reset the B2101 trouble code without fixing the underlying issue?

- While you can clear the trouble code temporarily, it is not recommended to ignore the underlying problem causing the B2101 code, as it may lead to further complications and failures.

7. How much does it typically cost to repair the B2101 code related to head rest switch circuit failure?

- The cost of repairing the B2101 code can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can a DIY enthusiast fix the B2101 trouble code on their own?

- Depending on the extent of their automotive repair skills, a DIY enthusiast may be able to address the B2101 code by following repair guides, but it is recommended to consult a professional if unsure.

9. Are there any preventive measures to avoid the B2101 trouble code in the future?

- Regularly inspecting the electrical components in the head rest switch circuit, avoiding water damage to the controls, and using the controls gently can help prevent the recurrence of the B2101 trouble code.

10. Can the B2101 trouble code be related to other electrical issues in the vehicle?

- While the B2101 code specifically points to head rest switch circuit failure, it can be connected to other electrical problems if left unresolved, potentially affecting the overall electronics system in the vehicle.