In and out of limp mode

Would your fuel cap or breather on fuel tank be blocked

P228C, it has applied exclusively to diesel powered vehicles. It has also meant that the powertrain control module (PCM) had detected a low voltage signal from the control circuit of the electronic fuel pressure regulator, which reflected insufficient fuel pressure.

Read more at: https://www.obd-codes.com/p228c
Copyright OBD-Codes.com

This is known as "get me home" mode/limp mode.
It is designed for you to get the car safely to the side of the road. Needs to go to a garage as there is a fault somewhere which will probably need attaching to a computer to investigate.

Limp home should have an error code that woud identify the problem. Usually a sensor is not operating properly, Or even the ECU. I would "limp it home" till I could find an answer. If you can get it there most auto parts stores can help you read the code.

check the fusible links for power on both sides. sounds like the one to keep battery charged has popped.

To properly diagnose such situation you must supply more information. Such as: temperature: pressure fuel pressure tank level load area of operation which could mean driving uphill Downhill Flat Rd., Desert Road etc.

call douggy from trucktech he can bypass the system

I don't know exactly how the nissans work with their "limp" mode for what gear it goes into and such. This sounds like the computer is sensing a problem and going into the "limp" mode. Go get the code pulled to see what is says. If it has anything saying trans slipping or ratio problem then something internal in the the trans is wrong. Also, check the trans fluid and see if its burnt ( dark brown or black).

This is called limp mode chrysler did this to protect the transmission without leaving the owner stranded by the road,a few things will cause this mainly putting the wrong fluid in the transmission,they use only atf+4,or the govenor pressure sensor is acting up which should cause a check engine light to come on,or the transmission just needs a fluid and filter change,should be done every 2yrs or 36k miles,due the fluid and filter change about 40.00 but if you have the wrong fluid then the whole system needs to be flushed and refilled-transmission-torque convertor,radiator and cooler if equipped and all lines.