Monte Wingle

See the video at . Sometimes it throws P0172 and P0175 together.

Anyone ran into this before?

arU4ic

I saw that behavior in my 2011 - i know this sounds stupid, but is the fuel below 1/4 of a tank?

Seems like whatever you did, it fixed it, but more details about what "part" you installed would help.

Monte Wingle

Thanks for the feedback arU4ic. The part I replaced was the temperature and pressure sensor: . It didn't solve the problem. I'll pay attention to the gasoline fill level to see if it is only when below 1/4 of a tank.

arU4ic

Yeah, the Q7 has two full tanks (sorta) and there is a pump that moves fuel between the two - in my car one pump was down and I had this exact behavior.

Monte Wingle

Thanks for the help and advice. I ended up taking it to the dealer because the problem continued to worsen. It turned out to be the high pressure fuel pump. Cost to replace was $700, and well worth it, it is running great now.

arU4ic

Nice a happy ending.

Thlampman

Monte, My Q7 is doing the exact same thing. Can you get the P/N for the pump from the receipt or any codes that came up? Thank you

Derek Brown

Monte. Thanks for posting my car has exact same issue Just want to verify so i dont buy the wrong part. Did you have the mechanical pump on the engine replaced. Or the one inside the gas tank?

Chrisw83

Going to bump this thread instead of starting a new thread. My 2013 is doing the exact same thing, It will die each time i try to start unless I give it a lot of gas, then it cranks up and runs. Anyone else ran into this problem and resolved it with replacing the pump?

testarossaguy

I had this same issue with our old 2007 Q7 with the 4.2 V8. The left side HPFP failed both mechanically and electrically, resulting in a ton of fault codes, I chased my tail for days. The engine would start, but idled very rough, had no power, etc.