← View Generic B2166 Guide
Severity: High
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B2166: B2166: Immobilizer System Malfunction
on 2021 Honda PASSPORT
Fix Cost
$100 - $500
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 B2166 Mean on 2021 Honda PASSPORT?
The immobilizer system has detected a malfunction, preventing the engine from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
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Symptoms
- • Engine won't start
- • immobilizer light on dashboard
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Common Causes
- • Faulty immobilizer module
- • faulty key fob
- • low battery in key fob
- • incorrect key fob programming
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How to Fix B2166 on 2021 Honda PASSPORT
1. Check key fob battery level and replace if necessary. 2. Check key fob programming and reprogram if necessary. 3. Replace immobilizer module if faulty.
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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 B2166
B2164
Sequential Code
B2164: Seat Switch Circuit Malfunction
Medium
B2165
Sequential Code
B2165: Exterior Lighting Malfunction
Medium
B2167
Sequential Code
B2167: Audio System Fault
Medium
B2168
Sequential Code
B2168: 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