going downhill shifted to 1st, engine quit. now it stayed in 1st, wont start sts-se5

[grooby_doo]

Hello all, I'm new here. i have a 2013 STS-SE5 that I just got from someone. 1800 miles. Tonight I was coming home and going downhill so downshifted from 2nd to 1st because I was going super slow and wanted to keep the rpms decent but when I hit the downshift the engine just quit. I pulled to the side thinking I would just restart it. But it didn't shift to neutral and won't start. I let it sit 10 min thinking to reset the computer and started over and still nothing. Everything else works so I know it's not the battery. The parking brake is on and the oil light is on the cluster so i put a little oil in thinking it was that and still nothing. I pulled the codes they are this:

P0031
P0340
P0458
P0335
P0231
P0037
P081A

Still no luck. I have no idea why it won't start..won't even make a sound. I'm getting it towed tomorrow I guess so if anyone knows a good dealer in the Irvine, CA or Laguna Beach area that would help. I know of mission motorsports but when I called them they didn't know too much. Any ideas?? Thanks! grooby_doo@yahoo.com

[ARtraveler]

Hello all, I'm new here. i have a 2013 STS-SE5 that I just got from someone. 1800 miles. Tonight I was coming home and going downhill so downshifted from 2nd to 1st because I was going super slow and wanted to keep the rpms decent but when I hit the downshift the engine just quit. I pulled to the side thinking I would just restart it. But it didn't shift to neutral and won't start. I let it sit 10 min thinking to reset the computer and started over and still nothing. Everything else works so I know it's not the battery. The parking brake is on and the oil light is on the cluster so i put a little oil in thinking it was that and still nothing. I pulled the codes they are this:

P0031
P0340
P0458
P0335
P0231
P0037
P081A

Still no luck. I have no idea why it won't start..won't even make a sound. I'm getting it towed tomorrow I guess so if anyone knows a good dealer in the Irvine, CA or Laguna Beach area that would help. I know of mission motorsports but when I called them they didn't know too much. Any ideas?? Thanks! grooby_doo@yahoo.com

Hang in there. The mechanical gurus may be able to help with the codes you posted. The oil light going on with the cluster on, is normal. It goes off when the engine starts and oil pressure is attained. Adding oil when not needed could be harmful.

[chuck gross]

when you tried to start it did you make sure and have your foot on the brake? this will allow it to go back to neutral and start

[grooby_doo]

when you tried to start it did you make sure and have your foot on the brake? this will allow it to go back to neutral and start

yes i tried it both with the parking brake on and the parking brake off but also with my foot on the brake.

[msj4848]

Your fault codes are for 2 different O2 sensor heaters, the crank position sensor, the fuel pump circuit, the purge valve, and the pre-start relay according to the spydercodes app. With so many faults occurring at once, I would guess a blown fuse or a relay that came unseated. Check all fuses and relays would be where I would start, and then battery connections and condition.

[Bob Denman]

:agree: Start by checking for popped fuses... :thumbup:
You've got several codes pointing to the C.P.S., and another one mentions the purge valve.
They ALL mention fuses...