This code indicates the extended cylinder deactivation/variable displacement system has detected an abnormal operating condition. Code P3406 monitors cylinder management and exhaust aftertreatment components.
Find certified mechanics near you who can diagnose and repair P3406.
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.