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Steve, vehicle technician
Category: Nissan
Satisfied Customers: 1046
Experience:  Garage owner for thirty years
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Fault code p1089 rail pressure regulation on 10reg qashqai,

Customer Question

Fault code p1089 rail pressure regulation on 10reg qashqai
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: Yes reset few times p1089 rail pressure regulation
JA: What is the model/year of your Nissan?
Customer: 10reg qashqai 1.5diesel
JA: What year is your Nissan?
Customer: 2010
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: Trying to
JA: Anything else you want the Mechanic to know before I connect you?
Customer: No
Submitted: 6 months ago.
Category: Nissan
Expert:  Steve replied 6 months ago.

Good day and thank you for your question, my name is ***** ***** I am a fully qualified vehicle technician with over thirty years in the trade, hopefully I can help.

The code refers to a fault with the fuel rail pressure control valve. There are a few checks you can make and the first one is to ensure that the wiring to the fuel pressure control valve is good and that the connections are good.

The valve is located in the high pressure fuel pump at the front of the engine.

The next easy step if not done already would be to replace the fuel filter and ensure this does not have any metal filing in, if it does this would be a bad sign and indicate that the high pressure pump may be failing,

After this then the next check would be the flow control valve. but the problem may also be the fuel pressure regulator control solenoid, the fuel transfer pump, the injectors, or the fuel high-pressure pump itself.

It may need the high pressure pump removing and sending off for testing.

I hope this answers your question but do please feel free to ask any further details by replying to this thread.

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