← View Generic B1133 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B1133: B1133: Body Control Module (BCM) - Exterior Lighting Circuit Malfunction

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 B1133 Mean on 2021 Honda PASSPORT?

The Body Control Module (BCM) has detected a malfunction in the exterior lighting circuit, which may be causing issues with the headlights, taillights, or other exterior lights.
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Symptoms

  • • Dim or inoperative exterior lights
  • • faulty headlight aim
  • • or warning lights on the dashboard.
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Common Causes

  • • Faulty exterior light bulbs
  • • wiring or connector issues
  • • BCM failure
  • • or a problem with the lighting circuit relay.
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How to Fix B1133 on 2021 Honda PASSPORT

Check and replace any faulty exterior light bulbs. Inspect and repair any damaged or corroded wiring or connectors. Update the BCM software if necessary. Replace the BCM if it's faulty.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Exterior light bulb(s) Shop ↗ Wiring harness Shop ↗ Connector(s) Shop ↗ BCM software update Shop ↗

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1133

B1131 Sequential Code

B1131: Power Window Circuit Malfunction

Medium
B1132 Sequential Code

B1132: Seat Position Sensor Circuit Malfunction

Medium
B1134 Sequential Code

B1134: Immobilizer System Malfunction

Medium
B1135 Sequential Code

B1135: 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