← View Generic B2645 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B2645: B2645: Body Control Module (BCM) Malfunction - Exterior Lighting

on 2021 Honda PASSPORT

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2021 Honda

PASSPORT

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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 B2645 Mean on 2021 Honda PASSPORT?

The Body Control Module (BCM) has detected a malfunction in the exterior lighting system, which may cause issues with turn signals, brake lights, or other exterior lights.

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Symptoms

• Inoperative or flickering exterior lights
• turn signal lights not functioning
• brake lights not illuminating

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Common Causes

• Faulty BCM
• wiring issues
• blown fuse
• faulty exterior light bulbs
• or a malfunctioning exterior light switch

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How to Fix B2645 on 2021 Honda PASSPORT

1. Check and replace blown fuses. 2. Inspect and repair wiring issues. 3. Replace faulty exterior light bulbs. 4. Test and replace the BCM if necessary.

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Need Maintenance Info for Your PASSPORT?

Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.

View 2021 Honda PASSPORT Specs

Parts for 2021 Honda PASSPORT

BCM Shop ↗ fuses Shop ↗ wiring harness Shop ↗ exterior light bulbs 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 B2645

B2643 Sequential Code

💡 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