P012B - Turbocharger/Supercharger Inlet Pressure Sensor Circuit Range/Performance
A Turbocharger Inlet Pressure sensor measures the pressure in the air intake system prior to the Turbocharger.
Fault Code Explained
The sensor output signal is likely to be within it’s normal operating parameters but is not as expected for the current operating conditions. The ECM may have detected the sensor output is incorrect when compared with other sensor values.
If possible use a diagnostic computer to view live data readings for the sensor and compare to actual Inlet Pressure. Test sensor supply Voltage and output signal