← View Generic B2790 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B2790: B2790: Body System Security Malfunction

on 2021 Honda PASSPORT

Fix Cost

$100 - $500

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 B2790 Mean on 2021 Honda PASSPORT?

The body control module (BCM) has detected a security-related issue, such as a faulty door ajar switch or a malfunctioning alarm system.

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Symptoms

• Alarm system activation
• door locks not functioning
• or dashboard warning lights illuminated.

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Common Causes

• Faulty door ajar switch
• malfunctioning alarm system
• or a problem with the BCM's security communication protocol.

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How to Fix B2790 on 2021 Honda PASSPORT

1. Check the door ajar switches for proper operation and clean or replace them if necessary. 2. Inspect the alarm system wiring and connections for damage or corrosion. 3. Update the BCM's software if necessary. 4. Replace the BCM if it's faulty.

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Need Maintenance Info for Your PASSPORT?

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

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Parts for 2021 Honda PASSPORT

Door ajar switch Shop ↗ Alarm system wiring harness Shop ↗ BCM software update 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 B2790

B2788 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