well it bein a 3bar should be able to read to 31-2 psi,

but mines readin 2-3 psi out on vac and boost, so on gauges say 10, monitor is 7.5psi, and same alway upto 30.5 psi on gauges and 27.7psi on monitor, and over that dont read anymore.

just tested a brand new 3 bar map sensor, and doin ex same?

so most be ecu or monitor.