What does OBD2 code P0403 mean?+
P0403 stands for Exhaust Gas Recirculation Circuit Malfunction. EGR control circuit fault.
What causes code P0403?+
Faulty EGR solenoid; Wiring fault; Blown fuse; ECM issue
How do I fix code P0403?+
Check EGR solenoid resistance; Test wiring; Check fuse; Replace EGR solenoid
How much does it cost to fix P0403?+
Estimated repair cost for P0403 is $100–$400.
Is P0403 DIY-friendly?+
Yes — P0403 is generally DIY-friendly with basic tools.