Cut out while driving?

2008 AUDI A6
140,000 MILES • 2.0L • 2WD • MANUAL
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NAVI1985
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2008 Audi A6 2l pd140

Car cut out while driving and isn't pumping diesel from lift pump can be seen running of external fuel pump.

What is the repair for this? Will it be a new fuel pump or something more complicated and expensive?

Thank you
Jul 4, 2025 at 12:59 PM
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MECHTRIX
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Yep" sounds like the pump has failed. good luck
Jul 6, 2025 at 1:52 PM
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STRAILER
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That is hard to say, you need to test to see if the fuel pump is getting power when the engine is cranking over, here is a guide to help you and the color wire you need to test to the lift pump.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Wire color - Red/blk

There is also a fuse #1 30 amp in fuse panel C I would check as well. The fuel pump is run by the FPM which is under the right front luggage compartment, I would check that out as well.
Sep 5, 2025 at 5:29 PM
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