Code Po122

1998 CHEVROLET SILVERADO
300,000 MILES • 5.7L
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RONNIEFRANKIN
  • MEMBER
  • 7 POSTS
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.
Jan 28, 2019 at 5:00 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
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.
Jan 28, 2019 at 7:15 PM
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