← View Generic B1939 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B1939: B1939: Power Window Circuit Malfunction
on 2021 Honda PASSPORT
Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 B1939 Mean on 2021 Honda PASSPORT?
The B1939 code indicates a problem with the power window circuit, which may cause windows to malfunction or not function at all.
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Symptoms
- • Windows not moving
- • stuck
- • or not responding to switch
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Common Causes
- • Faulty window regulator
- • faulty window switch
- • wiring issue
- • or blown fuse
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How to Fix B1939 on 2021 Honda PASSPORT
1. Check and replace blown fuse. 2. Inspect and clean window switch. 3. Check and repair wiring issue. 4. Replace faulty window regulator or switch.
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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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Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B1939
B1937
Sequential Code
B1937: Climate Control System Malfunction
Medium
B1938
Sequential Code
B1938: Door Locks Malfunction
Medium
B1940
Sequential Code
B1940: Seat Position Sensor Circuit Malfunction
Medium
B1941
Sequential Code
B1941: Turn Signal/Hazard 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