[christisnt]

So I had a flashing CEL (which is commonly associated with a misfire) on my 2019 Camaro SS with D1X Procharger, LT4 High side, LT4 injectors, Fore Innovations dual in tank fuel pump, running e75-e85, which prompted me to get a code reader to see which cylinder it is, so i can pull that spark plug and check it. To my surprise, it showed no misfires. But it showed these codes.

P0121 (This code is thrown every time i let off in the middle of a full pull, goes away within 4-10 ignition cycles)
U0100- I know absolutely nothing about this code or what could cause this code.

[ember1205]

Originally Posted by christisnt

So I had a flashing CEL (which is commonly associated with a misfire) on my 2019 Camaro SS with D1X Procharger, LT4 High side, LT4 injectors, Fore Innovations dual in tank fuel pump, running e75-e85, which prompted me to get a code reader to see which cylinder it is, so i can pull that spark plug and check it. To my surprise, it showed no misfires. But it showed these codes.

P0121 (This code is thrown every time i let off in the middle of a full pull, goes away within 4-10 ignition cycles)
U0100- I know absolutely nothing about this code or what could cause this code.

A quick Google search seems to indicate that the P0121 is a TPS issue. Could be bad, could be dirty, could be...???

The U0100 is a communication issue where one of the modules couldn't be read. Is it possible that your electrical system / battery isn't up to the task?

[ctrlz]

Originally Posted by ember1205

A quick Google search seems to indicate that the P0121 is a TPS issue. Could be bad, could be dirty, could be...???

Not a bad TPS.
P0121 is a correlation issue, probably with the MAF sensor. Airflow is outside of the expected/allowable range. This will have to be tuned out.
Apparently a common code after installing a supercharger.

I would expect the U0100 to be a bit of a red herring until you deal with the obvious problem.

[christisnt]

Originally Posted by ctrlz

Not a bad TPS.
P0121 is a correlation issue, probably with the MAF sensor. Airflow is outside of the expected/allowable range. This will have to be tuned out.
Apparently a common code after installing a supercharger.

I would expect the U0100 to be a bit of a red herring until you deal with the obvious problem.

So basically, you mean that due to the PO121 code, it might be the main cause of the U0100?

[christisnt]

Originally Posted by ember1205

A quick Google search seems to indicate that the P0121 is a TPS issue. Could be bad, could be dirty, could be...???

The U0100 is a communication issue where one of the modules couldn't be read. Is it possible that your electrical system / battery isn't up to the task?

I would like to say my electrical system is definitely capable of handling the task. but i could be wrong for sure

[ember1205]

Originally Posted by christisnt

I would like to say my electrical system is definitely capable of handling the task. but i could be wrong for sure

I'm not sure if the cars with the LT4 motors get an alternator with higher output or not, that's the only reason I really mentioned the electrical system. Batteries seem somewhat hit or miss in these cars from what I've read. And, since there's a communication issue occurring, that could relate back to electrical.

At a minimum, it sounds like you need to have whoever tuned your car take another look as something seems off.

[ctrlz]

Originally Posted by christisnt

So basically, you mean that due to the P0121 code, it might be the main cause of the U0100?

U0100 is a very generic code that means some module has lost communication with the ECU. It does not say which module.

Definitely check all connections involved with the supercharger install.