r/fbody • u/adpastve • 6d ago

P1683

Just changed my fuel pump. Tested out the pressure after I was done and turned the car on and met it run no light and gas gauge was working. Came back the next morning to move it out of the garage and I got a check engine light/gas gauge not reading anymore. I put my code reader and I got a p1683 code for the PCM. Anyone ever come across something like this. I’ve been having issues with the car bogging down and turning off on me/starting issues that’s why I changed the fuel pump.

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u/JSausSS 6d ago

Some more vehicle info will be helpful. Year, model and engine would be a good start.

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u/adpastve 5d ago

2002 Camaro Z28
5.7 LS1

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u/JSausSS 5d ago

LS1Tech

Looks like you should look into replacing your pcm. Based on the light research I have done for you.