2003 Escalade will barely start and/or run... dtc p0120 p0220 p1515 p1516 p2135

[GM_LUVA]

She'd been sitting 4-5 years.. new fuel pump, battery, plugs and wires, good compression. Throws all these codes every time.. p0118, p0120, p0220, p1515, p1516, p2135

 

[S33k3r]

Have you looked up what the codes mean? Many times there will even be YouTube videos on troubleshooting and fixing them. I'm mobile at the moment, so not in a good position to search. Regardless, other things to consider may be a stuck throttle body (stuck mostly closed), a clogged intake, bad knock sensors, etc. -- things that would be in the air/fuel path that can have issues after the vehicle has been sitting a while.

Good luck, in any case and, to be clear, I'm just guessing as I have not researced those codes recently.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally help you with your question; however, other members on this Forum that are much more knowledgeable than me will chime in.

 

[MassHoe04]

May or may not help, but this thread includes mention of 2 codes you also have on yours...

2003 Chevy Tahoe P0120 P2135 Reduced Engine Power - OBD-Codes.com

Scanning down quickly, it looks like this person's problem was believed to have been related to a Pedal Position Sensor. Looks like it turned out to be something wiring harness.

May be worth a read...

Good luck!