B0055 medium Severity

B0055: Second Row Right Seatbelt Sensor Fault

No direct impact on engine performance or drivability, but safety restraint system functionality may be compromised.

Overview

B0055 DTC indicates a fault in the second row right seatbelt sensor within the passive restraint/SRS system, often due to sensor failure, wiring issues, or poor connections.

Common Symptoms

  • SRS/Airbag warning light illuminated
  • Seatbelt status indicator incorrect for second row right position
  • Audible seatbelt reminder chime triggered incorrectly

Most Common Causes

Faulty second row right seatbelt sensor high

Sensor internal failure resulting in invalid signal to the restraint control module.

Open or short circuit in sensor wiring medium

Broken conductors or pinched harness under the seat can cause loss of signal.

Poor electrical connection or corroded connector medium

Corrosion or loose pins at the sensor connector can trigger the code.

Communication loss with Body Control Module (BCM) or SRS control module low

Intermittent module communication errors or BCM input driver faults may be involved.

Diagnostic Steps

  1. Connect an SRS-capable scan tool to the vehicle diagnostics port and confirm B0055 presence.
    Expected: Code B0055 present and active without other related codes.
    Interpretation: Verifies the fault is current and isolated to the seatbelt sensor circuit.
  2. Visually inspect the second row right seatbelt sensor wiring and connector.
    Expected: No visible damage, pin corrosion, or loose connections.
    Interpretation: Find physical wiring issues that could cause open/short faults.
  3. Measure resistance across the seatbelt sensor terminals with the belt buckled and unbuckled.
    Expected: Resistance changes according to sensor specification (varies by vehicle).
    Interpretation: Out-of-spec resistance suggests internal sensor failure.
  4. Perform continuity test from sensor harness to BCM/SRS module input.
    Expected: Continuous circuit with no shorts to ground/power.
    Interpretation: Confirms wiring harness integrity.
  5. If wiring and sensor are verified good, check module communication and update/reflash BCM/SRS software if available.
    Expected: No communication errors and current software version.
    Interpretation: Eliminates software or module-level errors.

Repair Solutions

Clean and secure seatbelt sensor connector, repair wiring as needed. medium
Estimated Cost: $20 - $120

Basic wiring repair and connector cleaning often resolve communication issues.

Replace second row right seatbelt sensor. medium
Estimated Cost: $50 - $250

Sensor cost and labor may vary by vehicle model.

Reflash or replace BCM/SRS control module if communication fault persists. hard
Estimated Cost: $300 - $800

Advanced diagnostic and programming required; often dealer-level service.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Misinterpreting related codes from other seatbelt positions as B0055 without verifying sensor location

Frequently Asked Questions

What is the definition of the B0055 engine code?

When your OBD-II scanner reads B0055, it means: Second Row Right Seatbelt Sensor Fault. This code is related to the vehicle's Sensors.

Reflecting on severity: How bad is B0055?

You should treat B0055 as a medium issue. No direct impact on engine performance or drivability, but safety restraint system functionality may be compromised.

How do I know if I have code B0055?

The most typical signs are: SRS/Airbag warning light illuminated, Seatbelt status indicator incorrect for second row right position, Audible seatbelt reminder chime triggered incorrectly.

What causes the B0055 code?

Potential culprits include: Faulty second row right seatbelt sensor, Open or short circuit in sensor wiring, Poor electrical connection or corroded connector. A proper diagnosis is recommended.

How much does it cost to fix B0055?

It depends on what needs to be fixed. Clean and secure seatbelt sensor connector, repair wiring as needed. repairs are cheaper (~$120), while Reflash or replace BCM/SRS control module if communication fault persists. repairs are on the higher end (~$800).

Is B0055 a generic or manufacturer-specific code?

B0055 is not specific to any one brand. It can appear on Ford, Dodge, Toyota, Honda, Jeep, and other vehicles.

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