← View Generic B2979 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B2979: B2979: Power Window Relay Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost

$100 - $300

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 B2979 Mean on 2021 Honda PASSPORT?

The power window relay circuit has malfunctioned, preventing the windows from functioning properly. This code is typically set when the window regulator motor or the window switch is faulty.

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Symptoms

• Windows won't roll up or down
• or do so intermittently
• with no warning lights on the dashboard.

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Common Causes

• Faulty power window relay
• window regulator motor
• window switch
• or wiring issues.

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How to Fix B2979 on 2021 Honda PASSPORT

1. Check the power window relay and replace it if faulty. 2. Inspect the window regulator motor and replace it if necessary. 3. Test the window switch and replace it if faulty. 4. Check the wiring and repair any damage.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Power window relay Shop ↗ Window regulator motor Shop ↗ Window switch Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B2979

B2977 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