Recent content by Mmm555
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2015 Tahoe P0172 P1075 Fuel in Oil
2015 Tahoe LTZ. 5.3L. 111k miles- Mmm555
- Post #8
- Forum: Engine & Drivetrain
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2015 Tahoe P0172 P1075 Fuel in Oil
To close the loop here, I had to take it to a dealer since a number of local mechanics wouldn’t touch it. Turns out it was, in fact, the high-pressure fuel pump. Replace that and running right now. Although $1800 later…- Mmm555
- Post #6
- Forum: Engine & Drivetrain
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2015 Tahoe P0172 P1075 Fuel in Oil
Thanks a ton for the video. Checked the fuel trims. All running very very rich: -35 long term and -25 short term at idle. MAF numbers are good around 5.3 g/s. I checked PCV valve and it seems fine. I am getting close to certain its the HPFP given the codes and fuel getting into the oil and...- Mmm555
- Post #5
- Forum: Engine & Drivetrain
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2015 Tahoe P0172 P1075 Fuel in Oil
Thanks a ton. Assuming fuel trims are running super low -10 or lower, probably a safe bet it’s HPFP right?- Mmm555
- Post #3
- Forum: Engine & Drivetrain
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2015 Tahoe P0172 P1075 Fuel in Oil
New the the forum and looking for some advice to make sure I’m thinking right about a problem and don’t get worked by the shop. Check engine light comes on fairly regularly. Throws PO172 and PO175 codes. There’s fuel getting into the oil. Truck dielsels for a few seconds after shutting off...- Mmm555
- Thread
- Replies: 10
- Forum: Engine & Drivetrain
