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B1C18 Dodge Code - Passenger Active Headrest Control Circuit Low

Quick Answer

The B1C18 diagnostic trouble code (DTC) indicates a fault in the passenger active headrest control circuit, specifically that the circuit is reading low voltage or is not functioning as expected. Common causes include Faulty headrest actuator or motor, Damaged or corroded wiring in the headrest control circuit, Malfunctioning body control module (BCM) or related control units. 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
B1C18 Dodge indicates Passenger Active Headrest Control Circuit Low.
Common causes
Common causes include Faulty headrest actuator or motor, Damaged or corroded wiring in the headrest control circuit, Malfunctioning body control module (BCM) or related control units.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 21, 2024
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Code B1C18 Dodge Description

The B1C18 diagnostic trouble code (DTC) indicates a fault in the passenger active headrest control circuit, specifically that the circuit is reading low voltage or is not functioning as expected. Active headrests are designed to move forward in a collision to reduce the risk of whiplash injuries by supporting the occupant's head more effectively. When this code is triggered, it suggests that the control module for the headrest may not be receiving the necessary voltage to operate correctly, or there could be an issue with the headrest mechanism itself.

OBDII Code B1C18 Dodge - Passenger Active Headrest Control Circuit Low
B1C18 Dodge Code - Passenger Active Headrest Control Circuit Low

Common Causes of B1C18 Dodge

  1. Faulty headrest actuator or motor.
  2. Damaged or corroded wiring in the headrest control circuit.
  3. Malfunctioning body control module (BCM) or related control units.
  4. Poor electrical connections or loose connectors in the circuit.
  5. Software issues or faults in the vehicle's onboard diagnostic system.

Symptoms of B1C18 Dodge

  1. Inoperative passenger active headrest.
  2. Warning light illuminated on the dashboard related to the airbag or safety systems.
  3. Unusual noises coming from the headrest area when attempting to adjust it.
  4. Difficulty in manually adjusting the headrest position.
  5. Other electrical issues in the vehicle, such as malfunctioning interior lights or power seats.

How to Fix B1C18 Dodge

  1. Diagnostic Scan: Begin by using an OBD-II scanner to confirm the presence of the B1C18 code and check for any additional codes that may provide more context.
  2. Visual Inspection: Inspect the wiring harness and connectors associated with the passenger active headrest for signs of damage, corrosion, or loose connections.
  3. Test the Actuator: Use a multimeter to check the voltage at the headrest actuator. If the voltage is low, trace the circuit back to the BCM to identify any breaks or shorts.
  4. Repair or Replace Components: Depending on the diagnosis, repair any damaged wiring or connectors. If the actuator is faulty, replace it with a new unit.
  5. Clear Codes and Test: After repairs, clear the diagnostic codes and perform a test drive to ensure the active headrest functions correctly and that the code does not reappear.

Cost to Fix B1C18 Dodge

The typical repair costs for addressing the B1C18 code can vary widely based on the specific issue identified during diagnosis. On average, you might expect to pay between $100 and $400 for repairs, including parts and labor. Labor rates at auto repair shops generally range from $80 to $150 per hour, with metropolitan areas or dealerships often charging higher rates. Independent shops may offer lower rates. The time required for diagnosis and repair can also vary based on the complexity of the issue, so it's advisable to check local rates for a more precise estimate.

When is the Code Detected?

This code will set, if the Occupant Restraint Controller (ORC) detects low voltage on the Active Head Restraint 1st Row Passenger Signal circuit.

Need more information about the B1C18 Dodge code?

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1C18 Dodge Code

1. What are the common symptoms of OBDII code B1C18 in a Dodge related to the Passenger Active Headrest Control Circuit Low?

The common symptoms include the active headrest not deploying properly in the event of a rear-end collision and the airbag warning light being illuminated on the dashboard.

2. What are the possible causes of OBDII code B1C18 in a Dodge?

The code B1C18 in a Dodge typically indicates a fault in the Passenger Active Headrest Control Circuit due to issues such as a damaged wiring harness, loose connections, or a malfunctioning control module.

3. How can I diagnose the OBDII code B1C18 in my Dodge?

Diagnosing OBDII code B1C18 involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connections related to the passenger active headrest system, and testing the control module for proper functionality.

4. Can I continue driving my Dodge with OBDII code B1C18 present?

It is not recommended to drive your Dodge with OBDII code B1C18 present, as it indicates a potential safety issue with the passenger active headrest system that may compromise occupant protection in the event of a rear-end collision.

5. How can I repair OBDII code B1C18 in my Dodge?

Repairing OBDII code B1C18 involves addressing the underlying cause of the fault, which may include repairing or replacing damaged wiring, securing loose connections, or replacing the faulty control module as needed.

6. Is OBDII code B1C18 in a Dodge a serious issue?

OBDII code B1C18 related to the Passenger Active Headrest Control Circuit Low should be taken seriously, as it can affect the proper deployment of the active headrest system designed to enhance occupant safety in certain collision scenarios.

7. Can I reset OBDII code B1C18 in my Dodge by disconnecting the battery?

While disconnecting the battery may reset the fault code temporarily, it will not address the underlying issue causing OBDII code B1C18. It is important to diagnose and repair the root cause of the problem to ensure proper functionality of the passenger active headrest system.

8. How much does it cost to repair OBDII code B1C18 in a Dodge?

The cost of repairing OBDII code B1C18 in a Dodge can vary depending on the specific cause of the fault, the extent of the repairs needed, and labor rates in your area. It is recommended to consult with a qualified mechanic or dealership for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code B1C18 in a Dodge?

While some DIY enthusiasts may have the skills to diagnose and repair OBDII code B1C18, it is recommended to have the issue addressed by a professional technician with experience in automotive electrical systems to ensure proper repair and safety compliance.

10. How can I prevent OBDII code B1C18 from occurring in my Dodge in the future?

To help prevent OBDII code B1C18 from occurring in the future, it is important to perform regular maintenance checks on the passenger active headrest system, avoid physical damage to wiring and connectors, and address any warning signs promptly to prevent potential faults.

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