← View Generic P0308 Guide
Severity: High
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
P0308: Cylinder 8 Misfire Detected
on 2021 Honda PASSPORT
Fix Cost
$20 - $300
Parts & Labor
Difficulty
2/5
30 mins - 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 P0308 Mean on 2021 Honda PASSPORT?
The engine control module has detected a misfire specifically in cylinder 8. This applies to V8 engines.
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Symptoms
- • Rough idle
- • engine shaking
- • loss of power
- • flashing check engine light during acceleration
- • poor fuel economy.
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Common Causes
- • Faulty spark plug in cylinder 8
- • bad ignition coil
- • clogged fuel injector
- • low compression
- • carbon buildup.
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How to Fix P0308 on 2021 Honda PASSPORT
Replace spark plug for cylinder 8, test ignition coil, clean fuel injector, perform compression test, remove carbon deposits.
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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 P0308
P0306
Sequential Code
Cylinder 6 Misfire Detected
High
P0307
Sequential Code
Cylinder 7 Misfire Detected
High
P0309
Sequential Code
Cylinder 9 Misfire Detected
High
P0310
Sequential Code
Cylinder 10 Misfire Detected
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