CA's version of EPA is CARB. There is no update requirements for any Diesel engine in the state...OEM for the year of mfgt is the only expectation.
And, since there is no emissions check for Diesel engines in vehicles with a GVWR over 14,000 lb, there are no controls on owner modification for RV's
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV