← View Generic B1118 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B1118: B1118: Immobilizer System 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 B1118 Mean on 2021 Honda PASSPORT?
The immobilizer system has detected a malfunction, preventing the vehicle from starting or running. This code is often related to issues with the immobilizer key fob, keyless entry system, or the vehicle's computer.
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Symptoms
- • Vehicle won't start
- • key fob not recognized
- • alarm system malfunction
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Common Causes
- • Faulty key fob
- • worn-out key fob battery
- • keyless entry system failure
- • immobilizer computer malfunction
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How to Fix B1118 on 2021 Honda PASSPORT
Check and replace the key fob battery if low Reset the immobilizer system using a scan tool Replace the key fob if faulty Update the immobilizer computer software if necessary
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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 B1118
B1116
Sequential Code
B1116: Seat Switch Circuit Malfunction
Medium
B1117
Sequential Code
B1117: Malfunction of Front Turn Signal Lamp
Medium
B1119
Sequential Code
B1119: Audio System Malfunction
Medium
B1120
Sequential Code
B1120: Airbag System Fault
High
💡 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