In most instances, car companies program the ECU to combine efficiency with reliability and longevity. This programming is normally a safe, universal one, with exactly the same settings for that ...

Come Monday, however, if your car's ECU program isn't verified as legal by a California Air Resources Board (C.A.R.B.) Executive Order, then your car won't pass smog, regardless of its emissions ...

“For ECU programming, you had to rip out the OEM computer, put in a new computer, like a generic, third-party computer, and program it from scratch,” he said.