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B1E49 RAM Code - 3rd Row Seat Right Backrest Position Sensor Circuit Low

Quick Answer

The B1E49 diagnostic trouble code (DTC) indicates a malfunction in the 3rd row seat right backrest position sensor circuit, specifically signaling a "low" voltage condition. Common causes include Faulty Position Sensor: The backrest position sensor itself may be defective or damaged, Wiring Issues: Damaged, frayed, or corroded wiring in the sensor circuit can lead to low voltage readings, Connector Problems: Loose or corroded connectors can interrupt the signal between the sensor and the BCM. 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
B1E49 RAM indicates 3rd Row Seat Right Backrest Position Sensor Circuit Low.
Common causes
Common causes include Faulty Position Sensor: The backrest position sensor itself may be defective or damaged, Wiring Issues: Damaged, frayed, or corroded wiring in the sensor circuit can lead to low voltage readings, Connector Problems: Loose or corroded connectors can interrupt the signal between the sensor and the BCM.
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 18, 2024
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Code B1E49 RAM Description

The B1E49 diagnostic trouble code (DTC) indicates a malfunction in the 3rd row seat right backrest position sensor circuit, specifically signaling a "low" voltage condition. This sensor is integral to the vehicle's seating system, providing feedback on the position of the right backrest to the vehicle's body control module (BCM) or seat control module. The BCM uses this information to ensure that the seat is properly adjusted for safety and comfort, and it may also play a role in the deployment of airbags in the event of a collision.

OBDII Code B1E49 RAM - 3rd Row Seat Right Backrest Position Sensor Circuit Low
B1E49 RAM Code - 3rd Row Seat Right Backrest Position Sensor Circuit Low

Common Causes of B1E49 RAM

  1. Faulty Position Sensor: The backrest position sensor itself may be defective or damaged.
  2. Wiring Issues: Damaged, frayed, or corroded wiring in the sensor circuit can lead to low voltage readings.
  3. Connector Problems: Loose or corroded connectors can interrupt the signal between the sensor and the BCM.
  4. BCM Malfunction: A failure in the body control module can misinterpret the signals from the sensor.
  5. Environmental Factors: Exposure to moisture or contaminants can affect the sensor's performance and wiring integrity.

Symptoms of B1E49 RAM

  1. Warning Light: The illumination of the airbag or seatbelt warning light on the dashboard.
  2. Inoperative Seat Adjustments: The right backrest may not adjust properly or may be stuck in one position.
  3. Inconsistent Feedback: The vehicle may provide erratic or incorrect feedback regarding the seat position.
  4. Increased Noise: Unusual sounds from the seat mechanism when attempting to adjust the backrest.
  5. Safety System Malfunctions: Potential issues with the airbag system or seatbelt reminders due to the sensor's failure.

How to Fix B1E49 RAM

  1. Diagnostic Scan: Begin with a comprehensive diagnostic scan using an OBD-II scanner to confirm the B1E49 code and check for any related codes.
  2. Visual Inspection: Conduct a thorough visual inspection of the wiring harness and connectors associated with the 3rd row seat right backrest position sensor for any visible damage or corrosion.
  3. Test the Sensor: Use a multimeter to test the resistance and voltage output of the position sensor to determine if it is functioning within specifications.
  4. Repair or Replace Components: Depending on the findings, repair any damaged wiring or connectors. If the sensor is faulty, replace it with a new one.
  5. Clear Codes and Test Drive: After repairs, clear the diagnostic codes and perform a test drive to ensure the issue is resolved and that the warning light does not reappear.

Cost to Fix B1E49 RAM

The typical repair costs for addressing the B1E49 code can range from $100 to $500, depending on the specific issue identified during diagnosis. This estimate includes parts such as a new position sensor (which may cost between $50 and $200) and labor costs. Labor rates at auto repair shops can vary significantly based on location, vehicle make and model, and engine type. Most shops charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate and to obtain a detailed quote before proceeding with repairs.

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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 B1E49 RAM Code

1. What does the OBDII code B1E49 mean?

The B1E49 code indicates a problem with the 3rd Row Seat Right Backrest Position Sensor Circuit, specifically a low voltage condition.

2. What are the symptoms of the B1E49 code?

Symptoms may include the third-row seat's right backrest not adjusting properly, the seat being stuck in one position, or an illuminated check engine light or other warning indicators.

3. What causes the B1E49 code to appear?

Common causes include a faulty backrest position sensor, damaged wiring or connectors, or a problem with the seat control module.

4. Can I still use my vehicle with the B1E49 code active?

Yes, the vehicle is typically safe to drive, but the functionality of the third-row seat's right backrest may be compromised.

5. How do I diagnose the B1E49 code?

Diagnosis includes checking the wiring and connectors for damage, testing the backrest position sensor for proper operation, and scanning the seat control module for additional faults.

6. How do I fix the B1E49 code?

Repairs may involve replacing the backrest position sensor, repairing or replacing damaged wiring, or recalibrating the seat control module.

7. Can a dead battery cause the B1E49 code?

Yes, a low or dead battery can sometimes trigger this code due to insufficient voltage reaching the sensor circuit.

8. How much does it cost to fix the B1E49 code?

Repair costs depend on the issue but typically range from $100 to $300, depending on whether the sensor or wiring needs replacement.

9. Can I clear the B1E49 code without repairs?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isn’t addressed.

10. Is the B1E49 code specific to RAM vehicles?

Yes, this code specifically applies to RAM vehicles equipped with third-row seating and their related position sensor systems.

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