← View Generic B0099 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0099: B0099: Power Window Relay 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 B0099 Mean on 2021 Honda PASSPORT?

The B0099 code indicates a malfunction in the power window relay circuit, which controls the operation of the windows. This can cause windows to malfunction or fail to operate properly.
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Symptoms

  • • Windows may not roll up or down
  • • or may do so intermittently
  • • with no warning lights on the dashboard.
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Common Causes

  • • Faulty power window relay
  • • wiring issues
  • • blown fuse
  • • or a malfunctioning window switch.
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How to Fix B0099 on 2021 Honda PASSPORT

1. Check the fuse box for a blown fuse and replace it if necessary. 2. Inspect the wiring and connectors for damage or corrosion and repair as needed. 3. Test the power window relay circuit using a multimeter to identify any issues. 4. Replace the power window relay if faulty. 5. Check the window switch for proper operation and replace if necessary.

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Parts for 2021 Honda PASSPORT

Power window relay Shop ↗ Fuses Shop ↗ Wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0099

B0097 Sequential Code

B0097: Climate Control Blower Motor Fault

Medium
B0098 Sequential Code

B0098: Door Locks Malfunction

Medium
B0100 Sequential Code

B0100: Seat Position Sensor Malfunction

Medium
B0101 Sequential Code

B0101: Body System Code B0101 - Lighting

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