What does OBD2 code P0406 mean?+
P0406 stands for Exhaust Gas Recirculation Sensor A Circuit High. EGR position sensor A voltage is above expected range.
What causes code P0406?+
Open circuit in EGR sensor wiring; Faulty sensor; Short to power; Disconnected sensor
How do I fix code P0406?+
Check sensor connection; Test for open circuit in wiring; Replace EGR assembly
How much does it cost to fix P0406?+
Estimated repair cost for P0406 is $100–$400.
Is P0406 DIY-friendly?+
Yes — P0406 is generally DIY-friendly with basic tools.