Quote:
Originally Posted by oil_burner
Well, from their website it states that with the tune you won't be able to pass California emissions testing. The Dinan tuning intrigues me because they have a CA emissions legal tune.
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You are mistaking what a dealer can detect with deep diagnostics, vs what CA's CARB is checking for which are JUST CEL's and stored DTC's related to emissions.
The State of CA cannot detect a "tune." They can detect things like stored check engine lights and "poor," tunes that might disable a sensor for emissions, where it actually should have its values tweaked to not be tripped. (i.e. sensor in not ready state permanently)
It's technically against CA law to mess with engine components that disable emissions equipment or will increase emissions, unless you have an exempt vehicle. That's vague enough, but lays the framework for the basics.