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Code PO122

Tiny
RONNIEFRANKIN
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • 5.7L
  • 300,000 MILES
Back again. Throwing a Po122 code. Cleaned all everything that shows up on video help. No check engine light is on, but shows up on my 20.00 scanner. Any help is greatly appreciated.
Monday, January 28th, 2019 AT 5:00 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,035 POSTS
Welcome back. If the light isn't on but it does work during the bulb test then it is possible it is either a history code or possibly a pending code. I would disconnect the battery for a few minutes to erase anything in the system. Then run it a bit and see if the code comes back. If you have a chain store that scans for codes you may want to have them scan it as well, just to verify if it's a real code or a ghost.
If it does come back the likely hood is that the TPS wiring or the sensor itself has a fault. Not uncommon on that engine.
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Monday, January 28th, 2019 AT 7:15 PM

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