← View Generic U1003 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
U1003: Network Communication Code U1003 - Gateway
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 U1003 Mean on 2021 Honda PASSPORT?
Network communication diagnostic trouble code related to gateway 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 U1003 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 U1003
U1001
Sequential Code
Network Communication Code U1001 - CAN Bus
Medium
U1002
Sequential Code
Network Communication Code U1002 - Module Communication
Medium
U1004
Sequential Code
Network Communication Code U1004 - Network Hub
Medium
U1005
Sequential Code
Network Communication Code U1005 - Data Link
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