Recent content by dwoldring
-
D
2015 Yukon "System Too Rich" code, engine issues (P0172, P0175)
No, the ECU will not add fuel to cool the motor. Under high load conditions, the ECU will add fuel to cool the exhaust, but this doesn't happen at idle. Please don't spread misinformation.- dwoldring
- Post #11
- Forum: Engine & Drivetrain
-
D
2015 Yukon "System Too Rich" code, engine issues (P0172, P0175)
2015 Yukon XL with 5.3L. I changed the plugs (well 7/8, no way I'm getting to the one in the back on passenger side) and the thermostat was replaced. It seems to be better but its only been a few days. The check engine light went off last night, but still had a little after run on shut off. I...- dwoldring
- Post #10
- Forum: Engine & Drivetrain
-
D
2015 Yukon "System Too Rich" code, engine issues (P0172, P0175)
These are exactly my symptoms as well. 192k miles. I would love to hear what the cause was and what was done to fix it! Thanks!- dwoldring
- Post #8
- Forum: Engine & Drivetrain
