We've been getting a few folks lately running into specific CELs, namely P0201-P0204. These are injector hard circuit codes, and are not related to the tune, no matter who your tuner is. As the description of the code suggests, these are a faulty circuit between the fuel injector and the chassis's electrical harness. When this code occurs, your fuel injectors are losing power and connection with the ecu, and this will cause the injector to shut off.
This problem occurs solely on aftermarket injectors with adapter harnesses in place. Luckily, we have a fix for this issue in the form of hard connectors that eliminate the need for any poorly wired, aftermarket adapter harnesses. These connectors are available here:
https://www.delicioustuning.com/node/437
As a general reminder, check engine lights are not always, and really rarely an indication of a tuning issue. Check engine lights exist to warn the driver of a mechanical issue. If you run into a light and you aren't sure what is causing it, the best course of action is to ask your tuner what might be the cause, so they can give you guidance in diagnosing and fixing the issue.
Sincerely,
Zach
Delicious Tuning