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Code P310B, low fuel pressure?

Tiny
ANDRIN ATEM
  • MEMBER
  • 2015 AUDI Q7
  • 3.0L
  • 6 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 87,230 MILES
I have this code on my vehicle listed above TFSDI 3.0 liters. I got this code P310B, does this mean my pump in the tank is malfunctioning or is it referring to the high-pressure pump of its fuel pressure sensor itself.

Please help me out with the values I need to see on live data and any other information that can help me sort it out.
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Friday, July 26th, 2024 AT 11:57 AM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

As far as the code is concerned, it deals with low fuel pressure or fuel pressure regulation. However, it isn't listed as a code for this year and model. Are there other codes that are present? Also, let me know what the vehicle is doing.

I attached the directions from my manual that I have for your vehicle. Take a look and let me know if they help.

Take care,

joe

See pics below.
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Sunday, July 28th, 2024 AT 6:53 PM
Tiny
ANDRIN ATEM
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  • 250 POSTS
Thanks very much Jacob. May I have the diagram for the fuel line system, also the fuel pressure filter is located on the left or right side of the tank?
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Monday, July 29th, 2024 AT 3:29 AM
Tiny
ANDRIN ATEM
  • MEMBER
  • 250 POSTS
I doubt if that pump has pressure, because when I take out the fuel line, and I manually activate the pump, the fuel flows but slowly, to fill a 4 liters gallon, it can take up to 7 minutes. I doubt.
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Monday, July 29th, 2024 AT 3:38 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

As far as the fuel filter goes, it is in the tank. See pic 1 below.

When I go to fuel pump replacement, I get a few different things. Take a look at pic 2. I need to know if the pump in the tank is what is needed or the high-pressure pump is what you are looking for.

I have an arrow pointing to the one in the fuel tank.

Let me know.

Joe

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Monday, July 29th, 2024 AT 8:57 PM
Tiny
ANDRIN ATEM
  • MEMBER
  • 250 POSTS
Fuel delivery unit. The lift pump in the tank I mean. Thanks your information keeps me on track to deal with this issue.
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Tuesday, July 30th, 2024 AT 12:49 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

The first picture shows the location of the fuel filter. It is under the hood on the diesel. Picture 3 is an exploded view of all pump components in the tank.

The remaining pictures are the legends for each part in pic 3.

Let me know if this helps.

Joe

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Tuesday, July 30th, 2024 AT 12:22 PM
Tiny
ANDRIN ATEM
  • MEMBER
  • 250 POSTS
Thanks for this informations and diagrams.
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Tuesday, July 30th, 2024 AT 5:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

You are very welcome. I hope they help. If you have a chance, let me know how things work out for you.

Take care,

Joe
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Tuesday, July 30th, 2024 AT 7:20 PM

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