Will my diesel pass smog with a programmer?
Diesel vehicles with programmers can only pass smog if they have a valid EO number.
Quick Summary
A valid EO number is required for modified diesels.
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Answered by Sonny Baird
Last updated 1/16/2026, 3:07:59 PM
Only if it has a valid EO#
Sonny Baird
General Sales Manager, West Says Yes
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