Question here, My 2008 yukon has an ongoing thing... I keep getting 1175 codes even after i have changed all O2 sensors spark plugs and cleaned the mass air flow sensor and I have pulled the whole top of the engine off instaled new fuel injectors and seals ...Not sure where to go next.....Any ideas...
P1175 - Many changed parts so far but no results
- Thread starter Horse1955
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
The link below is the diagnostic path for P1175, but confirm your vehicle info before using.
The gas you use -- how much ethanol is in it (E10, E15, E85-ish) and what does the ECU think the ethanol content percentage is?
P1175 — 2008 GMC Yukon 2WD V8-5.3L Service Manual | Operation CHARM
Detailed repair manual for the 2008 GMC Yukon 2WD V8-5.3L.
charm.li
The gas you use -- how much ethanol is in it (E10, E15, E85-ish) and what does the ECU think the ethanol content percentage is?
UpAndDown
Full Access Member
Did you use OEM oxygen sensors?
Also, eBay and Amazon, etc. fuel injectors are known to be faulty or counterfeit. Where were the fuel injectors sourced, and what brand?
I was asking about ethanol percentage, not octane.
- Joined
- Dec 31, 2025
- Posts
- 604
- Reaction score
- 577
Fless is asking regular gas station is around 10% ish. At least in my area. If E85 then a different story.
- Joined
- Dec 31, 2025
- Posts
- 604
- Reaction score
- 577
P1175 (lean bank 2). Gasket not right or possible vacuum hose on that side is sucking air after the mass air flow sensor.
Around the midwest the fuel industry has been sneeking in E-15
and calling in "Regular Unleaded"
What a bunch of shit !!! Unless it's a flex fuel enabled engine, E15 can
suck it!!! Gotta Pay Extra $$$ for E10... Like it's not expensive enough already.
I would think this is going to cause issues, especially as the season gets hot
and calling in "Regular Unleaded"
What a bunch of shit !!! Unless it's a flex fuel enabled engine, E15 can
suck it!!! Gotta Pay Extra $$$ for E10... Like it's not expensive enough already.
I would think this is going to cause issues, especially as the season gets hot
Yes I did
Similar threads
