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sprinkles08, ASE Certified Technician
Category: Nissan
Satisfied Customers: 22986
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Np300 yd25/d22: Nissan NP300 YD25/D22 engine running

Customer Question

Nissan NP300 YD25/D22 engine running for a while and turn to limp mode not reving above 4000 revs, changed the pressure regulator from the pump and common rail pressure and still the car loses pressure
Submitted: 1 year ago.
Category: Nissan
Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!If the engine is going into limp in it is because the engine controller has seen an issue that will prevent proper operation and is setting a fault code. There are literally dozens of things that will cause limp in including nearly any sensor, wiring, injectors, low fuel supply; nearly anything that will prevent proper engine control.The first step in diagnosing the problem is to use a scan tool or code reader to see what fault codes are setting when this happens. Do you know what codes are setting?