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B1B7E Chrysler Code - Passenger Seat Weight Sensor 2 Right Front Input Circuit Low

Quick Answer

The B1B7E Chrysler code indicates a problem with the Passenger Seat Weight Sensor 2 Right Front Input Circuit being too low. Common causes include Faulty passenger seat weight sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or loose connections in the sensor circuit. 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
B1B7E Chrysler indicates Passenger Seat Weight Sensor 2 Right Front Input Circuit Low.
Common causes
Common causes include Faulty passenger seat weight sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or loose connections in the sensor circuit.
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 Sep 13, 2024
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Code B1B7E Chrysler Description

The B1B7E Chrysler code indicates a problem with the Passenger Seat Weight Sensor 2 Right Front Input Circuit being too low. This sensor is responsible for detecting the weight of the passenger in the right front seat in order to determine whether or not to deploy the airbag in the event of a collision. When this sensor malfunctions or reads a low input, it can lead to issues with the airbag system, potentially causing the airbag not to deploy when needed or to deploy unexpectedly.

OBDII Code B1B7E Chrysler - Passenger Seat Weight Sensor 2 Right Front Input Circuit Low
B1B7E Chrysler Code - Passenger Seat Weight Sensor 2 Right Front Input Circuit Low

Common Causes of B1B7E Chrysler

  1. Faulty passenger seat weight sensor.
  2. Damaged wiring or connectors in the sensor circuit.
  3. Corrosion or loose connections in the sensor circuit.
  4. Issues with the airbag control module.
  5. Impact or damage to the passenger seat affecting sensor readings.

Symptoms of B1B7E Chrysler

  1. Airbag warning light illuminated on the dashboard.
  2. Inability to turn off passenger airbag when necessary.
  3. Intermittent or non-functioning passenger airbag.
  4. Diagnostic trouble codes related to the airbag system.

How to Fix B1B7E Chrysler

  1. Begin by diagnosing the specific cause of the low input signal using a diagnostic scanner.
  2. Inspect the passenger seat weight sensor and its wiring for any visible damage or corrosion.
  3. Test the sensor's resistance and voltage output to determine if it is functioning correctly.
  4. Replace the passenger seat weight sensor if it is found to be faulty.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix B1B7E Chrysler

The cost of repairing a Passenger Seat Weight Sensor 2 Right Front Input Circuit Low issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the cost of parts for this repair can range from $100 to $300, with labor costs adding an additional $100 to $200. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's best to check with local shops for a more accurate estimate.

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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 B1B7E Chrysler Code

1. What does the OBDII code B1B7E mean on a Chrysler vehicle?

The B1B7E code indicates a problem with the Passenger Seat Weight Sensor 2 Right Front Input Circuit, specifically that the circuit voltage is lower than expected.

2. What are the common symptoms of the B1B7E code?

Typical symptoms include the airbag warning light being illuminated, issues with the passenger airbag system, and potentially incorrect airbag deployment in a crash.

3. What causes the B1B7E code to appear?

Common causes include a faulty passenger seat weight sensor, damaged wiring or connectors, a short circuit, or an issue with the Occupant Classification System (OCS) module.

4. Is it safe to drive with the B1B7E code active?

While the vehicle may still be drivable, the passenger airbag may not function correctly, which can compromise safety in the event of an accident.

5. How do I fix the B1B7E code on my Chrysler?

Start by inspecting the wiring and connectors under the passenger seat for damage or loose connections. If no issues are found, the weight sensor or OCS module may need to be tested and replaced if faulty.

6. Can I reset the B1B7E code without repairs?

You can clear the code with an OBDII scanner, but if the underlying issue isn’t resolved, the code and airbag warning light will likely return.

7. How much does it cost to fix the B1B7E code?

Repair costs vary depending on the issue. Replacing a weight sensor may cost $200-$500, while fixing wiring or connectors could be less expensive.

8. What tools do I need to diagnose the B1B7E code?

You’ll need an OBDII scanner capable of reading airbag/OCS codes, along with basic tools to inspect and repair wiring or connectors.

9. Can a malfunctioning passenger seat weight sensor affect other systems?

Yes, a faulty sensor can impact the airbag system, potentially disabling the passenger airbag or causing improper deployment.

10. Should I take my Chrysler to a professional for the B1B7E code?

If you’re unable to diagnose or repair the issue yourself, it’s best to have a certified mechanic or dealership address the problem to ensure the airbag system functions properly.

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