The engine control module has detected a misfire specifically in cylinder 5. This code typically appears on V6, V8, or larger engines where cylinder 5 must be individually diagnosed.
Find certified mechanics near you who can diagnose and repair P0305.
For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.