← View Generic U3872 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
U3872: Network Communication Code U3872 - Module Communication
on 2021 Honda PASSPORT
Fix Cost
$50 - $300
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 U3872 Mean on 2021 Honda PASSPORT?
Network communication diagnostic trouble code related to module communication communication.
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Symptoms
- • Communication errors
- • module malfunctions
- • system integration failures
- • CAN bus issues.
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Common Causes
- • CAN bus faults
- • module communication errors
- • wiring problems
- • connector corrosion.
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How to Fix U3872 on 2021 Honda PASSPORT
Check CAN bus integrity, test module communication, repair wiring, clean connectors.
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Need Maintenance Info for Your PASSPORT?
Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.
View 2021 Honda PASSPORT SpecsParts for 2021 Honda PASSPORT
Essential Tool
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Related Diagnostic Codes
Other codes that may appear with U3872
U3870
Sequential Code
Network Communication Code U3870 - Bus Fault
Medium
U3871
Sequential Code
Network Communication Code U3871 - CAN Bus
Medium
U3873
Sequential Code
Network Communication Code U3873 - Gateway
Medium
U3874
Sequential Code
Network Communication Code U3874 - Network Hub
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