L405 Low Fuel Pressure- Not HPFPs

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May 6, 2024 | 10:37 PM

#11

Lumidee

6th Gear

Joined: Apr 2024

Posts: 6

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Quote:

Originally Posted by tracyc

Nice description of the diagnostic process from another thread.
Post by LR Techniker:

Thanks for this.
But the issues I have on my LR4 2010 V8 right now is that, while driving without the AC it sets a P0087 (Fuel rail/system pressure low) . Then when the AC is on, it gives a P0088 (Fuel rail/system pressure high).
When the codes are cleared, they get cleared.

If car is started and in use with the AC on, only a P0088 (fuel rail/system pressure high). And this alone will be the only fault code set.

But if the car is started and in use with the AC off, only the P0087 (fuel rail system/ pressure low) will be the fault code.

This is my problem right now with the LR4 2010 V8 and I really wish I can get it solved with experience from here. Thanks in anticipation of your prompt response.