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P0302
2014 Toyota Corolla
Toyota
Severity
High
Safe to Drive
Limited
Est. Time
2hrs
Difficulty
Difficult
SYMPTOM
Engine shakes noticeably at idle, check engine light flashing
Why This Happens
Low compression in a single cylinder, often from a worn piston ring or valve issue, can cause a persistent misfire that ignition parts alone won't fix.
VERIFIED FIX:
Compression issue identified, cylinder head inspected — further engine work recommended
How It Was Diagnosed
Low compression in a single cylinder, often from a worn piston ring or valve issue, can cause a persistent misfire that ignition parts alone won't fix.
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