Originally Posted by 02ls400

I have 2000 ls 400, I've been having my check engine light on for a while. The car has also been experiencing limp mode, slow acceleration, bad fuel economy, speedometer coming on and off, the VSC staying on. I decided to go get a diagnostic to see what was wrong with it. Before i had it tested i wanted to use my own ob2 scanner to see what the dtc codes were, P1354 p1351(I tried switching out the solenoid, didn't do anything, and my timing belt was good). p0763. After i did my diagnostics, i got totally new codes, which were (P1125,P1755,P1765,P1656,P0763), i need help in what i should do with my car. i think i might have a ecu problem but i can't tell.