← View Generic B1125 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B1125: B1125: Body Control Module (BCM) Malfunction - Lighting

on 2021 Honda PASSPORT

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2021 Honda
PASSPORT
⚠️

Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B1125 Mean on 2021 Honda PASSPORT?

The Body Control Module (BCM) has detected a malfunction in the vehicle's lighting system, such as a faulty headlight, taillight, or turn signal.
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Symptoms

  • • Dim or inoperative headlights
  • • taillights
  • • or turn signals
  • • unusual lighting patterns
  • • or warning lights on the dashboard.
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Common Causes

  • • Faulty BCM
  • • wiring issues
  • • blown fuses
  • • burnt-out bulbs
  • • or problems with the lighting switch.
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How to Fix B1125 on 2021 Honda PASSPORT

1. Check and replace blown fuses. 2. Inspect and replace burnt-out bulbs. 3. Check and repair wiring issues. 4. Update or replace the BCM if faulty. 5. Check and adjust the lighting switch.

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Parts for 2021 Honda PASSPORT

BCM Shop ↗ fuses Shop ↗ bulbs Shop ↗ wiring harness Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2021 Honda PASSPORT

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Related Diagnostic Codes

Other codes that may appear with B1125

B1123 Sequential Code

B1123: Window Regulator Malfunction

Medium
B1124 Sequential Code

B1124: Seat Height Sensor Circuit Malfunction

Medium
B1126 Sequential Code

B1126: Body Control Module (BCM) Security System Malfunction

Medium
B1127 Sequential Code

B1127: Audio System Malfunction

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system