Engine shuts off while driving, codes P0120, P0220 and P1516

SEANDATANK

MEMBER
2005 GMC YUKON
5.3L
V8
4WD
AUTOMATIC
160,000 MILES

My truck shut off while I was driving. It acted like it had no fuel, but there was gas in the tank. It did this five times before I got back to my house. It would start right back up. When I put my scanner on it it pulled codes for p0120 p0220 and p1516 those codes let me to believe that it was the TPS. I change the TPS and I am still having the same issue. Could this be a fuel pump or a different sensor? Because now Ia m getting no codes at all and my check engine light is not on nor is any other lights.

1 Reply

DANNY L

MECHANIC
5,648 POSTS

Hello, I am Danny.

Yes, I would suggest testing the fuel pressure. It could be a weak/failing fuel pump. If you do not have access to a pressure tester your local auto parts stores have a tool loaner program and will rent you one. Your fuel pressure should be 55-62 P.S.I. I have attached a tutorial showing how to test. Also, code P0120 is the Accelerator Position Sensor. Was that replaced? It is mounted to the gas pedal and acts as a drive-by-wire linkage in conjunction with the TPS you replaced. I have attached a picture. Hope this helps and feel free to ask any questions.Thanks for using 2CarPros.
Danny-

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

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