View Full Version : Nissan Expert advice please

10-20-2020, 07:35 AM
Good day, I have a 2018 Nissan Frontier 2.5l NP300, 60 000km on the clock. it keeps going into limp mode when I reach 3000rpm. the only error I get is P012B. can this cause the limp mode and how can I fix it?

We tried replacing the Solenoid Control Valve on the pump
Replaced the Pressure Release Valve

Any and all advice will be appreciated!

10-27-2020, 06:18 PM
Unfortunately, we don't have the 2.5 diesel engine in the US. The P012B code can be triggered by the following:

-Faulty Turbocharger/Supercharger Inlet Pressure Sensor
-Turbocharger/Supercharger Inlet Pressure Sensor harness is open or shorted
-Turbocharger/Supercharger Inlet Pressure Sensor circuit poor electrical connection

Read more: P012B Turbocharger/Supercharger Inlet Pressure Sensor Circuit Range/Performance Downstream Of Throttle Valve (

I would believe that it could cause you to go into limp mode. I did find that there are several YouTube videos that have diagnostic information pertaining to this code for this application, so that would be a good place to start. You should check the harness connections in the circuit to make sure the pins are clean, straight and not pushed out of the connector. Ideally, a factory service manual should be accessed where you can find the step-by-step diagnostics for that particular code along with the wiring diagrams, but I don't know of any places to access FSM's for vehicles outside of the US.