• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Have a few DTC's P0121, P0521, P0523

SDGTP99

SDGTP99

New member
I have an idea what is causing my car to run like pooh;

-DTC P0121, which is for a bad TPS. I just ordered a new TB to fix this issue.
-DTC P0521 & P0523 are both for Low oil pressure/low oil level/faulty electronics.

I haven't done much to the car lately except an oil change, and the oil level is fine. Could a bad throttle body be causing all of these problems? Could it cause the engine to constantly switch from 4 to 8 cylinders, consume oil & lose pressure? I honestly don't know. But, when driving it does feel like the car is either knocking, switching from 4 to 8 cylinders or shifting. Any help at all will be appreciated. =]
 


I did. Oil level is fine. Guys on LS1Tech say the P0521 is caused by a bad Oil Pressure sensor. Still unsure what caused the P0523.
 
Replaced oil Pressure sensor. Car suns a wee bit better. Still acts like its missfireing and the tailpipes are turning black fast. Doubt that's caused by a bad TPS. I bet I have a nasty consumption problem...
 
Had my Throttle body replaced under warranty around 45k and just had my oil pressure switch replaced.
 


I replaced both out of pocket. Not sure I needed to. Codes went away after cleaning TB and adding a quart of oil. =\
 
You must log in or register to reply here.
Back
Top