AutoCodes – RAM – B1C18 RAM

B1C18 RAM Code - Passenger Active Headrest Control Circuit Low

Quick Answer

The Passenger Active Headrest signal circuit is driven by a solenoid that also uses a diode in parallel. Common causes include Faulty Passenger Active Headrest, Passenger Active Headrest harness is open or shorted, Passenger Active Headrest 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: B1C18 RAM indicates Passenger Active Headrest Control Circuit Low.
Common causes: Common causes include Faulty Passenger Active Headrest, Passenger Active Headrest harness is open or shorted, Passenger Active Headrest 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 590

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 Aug 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1C18 RAM Description

The Passenger Active Headrest signal circuit is driven by a solenoid that also uses a diode in parallel. The single electrical component of the Active Headrest (AHR) unit is the latch-release solenoid. The solenoid is connected by a 2 way pigtail wire and harness connector. The pigtail wire and 2 way connector are routed through the center of one of the headrest support posts and down through the guide sleeve to the interior of the seat back, where it connects to the seat wire harness. The solenoid is grounded at an independent dedicated ground. The AHR components itself cannot be repaired. If damaged or ineffective, the AHR must be replaced as a new assembly. If upon inspection the AHR has deployed it can be reset following the proper reset method.

OBDII Code B1C18 RAM - Passenger Active Headrest Control Circuit Low - AutoCodes.com — B1C18 RAM Code - Passenger Active Headrest Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1C18 RAM?

Faulty Passenger Active Headrest
Passenger Active Headrest harness is open or shorted
Passenger Active Headrest circuit poor electrical connection
Fault Occupant Restraint Controller (ORC)

How to Fix the DTC B1C18 RAM?

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 B1C18 RAM 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 B1C18 RAM code?

Need more information on how to fix the B1C18 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1C18 RAM code diagnosed by a professional: Find a repair shop in your area

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 RAM Code

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

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the passenger active headrest not functioning properly.

2. What could cause the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low?

Possible causes of this code include faulty wiring or connectors in the passenger active headrest system, a malfunctioning headrest control module, or a damaged headrest itself.

3. How can I diagnose the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low?

Diagnosis typically involves using a professional OBDII scanner to read the specific fault code, inspecting the wiring and connectors related to the passenger active headrest system, and testing the headrest control module for proper functionality.

4. Is it safe to drive with the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low?

It is generally safe to drive with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to ensure the proper operation of the passenger active headrest system in case of an emergency.

5. How can I repair the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low?

Repairing this code may involve repairing or replacing damaged wiring, connectors, or components in the passenger active headrest system, resetting the fault code with a diagnostic tool, and conducting a thorough system test.

6. Can I reset the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low myself?

If you have the necessary diagnostic tools and knowledge, you may be able to reset the code yourself. However, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

7. How much does it typically cost to repair the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low?

The cost of repair can vary depending on the specific cause of the code and the labor rates in your area. It is advisable to get a few quotes from different mechanics to determine the most cost-effective solution.

8. Can a DIY enthusiast repair the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low at home?

While some DIY enthusiasts may have the skills and tools to diagnose and repair this code at home, it is recommended to have a professional mechanic handle the repair due to the complexity of the airbag system and safety concerns.

9. Are there any recalls related to the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low?

Recalls related to this specific OBDII code may vary depending on the vehicle manufacturer. It is advisable to check with the manufacturer or a certified dealer to see if there are any related recalls for your vehicle.

10. How often does the OBDII code B1C18 RAM Passenger Active Headrest Control Circuit Low occur in vehicles?

The occurrence of this specific OBDII code can vary depending on the vehicle make and model. If you encounter this code, it is essential to address it promptly to ensure the proper functioning of the passenger active headrest system.