← View Generic B0379 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0379: B0379: Power Window Relay Circuit Malfunction

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 B0379 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 relay circuit is open or shorted.
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Symptoms

  • • Windows do not operate
  • • may have a slow or erratic movement
  • • or may be stuck in one position.
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Common Causes

  • • Faulty power window relay
  • • wiring issues
  • • corrosion
  • • or damage to the window switch or motor.
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How to Fix B0379 on 2021 Honda PASSPORT

1. Disconnect the battery to reset the system. 2. Check the power window relay for signs of physical damage or corrosion. 3. Test the relay circuit using a multimeter to identify any shorts or opens. 4. Replace the power window relay if faulty. 5. Inspect and clean the wiring and connectors for corrosion or damage. 6. Replace the window switch or motor if necessary.

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Parts for 2021 Honda PASSPORT

Power window relay Shop ↗ Wiring harness Shop ↗

Essential Tool

Must Have

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Related Diagnostic Codes

Other codes that may appear with B0379

B0377 Sequential Code

B0377: Climate Control Fan Not Operating

Medium
B0378 Sequential Code

B0378: Door Lock Actuator Circuit Malfunction

Medium
B0380 Sequential Code

B0380: Seat Switch Circuit Malfunction

Medium
B0381 Sequential Code

B0381: Turn Signal Lamp 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