throwing p1105 and p0402. do i have to replace both or just one?

Question

do i need to replace both the egr and the map or can i just replace one and it will fix both codes?

Answer 1

P0402 Exhaust gas recirculation flow excesive

P1105 MAP / BARO switch solenoid valve

P1105 is for the MAP / BARO solenoid valve.when this code condition occurs it mostly due to a shorted or open circuit of the MAP /BARO solenoid valve. So you may have to do both.