fsm test

  1. Bambusiero

    EGR Vacuum Modulator - Sensitive Functional Bench Test & Alternative Part Numbers

    I've been getting intermittent P0401 error code (Insufficient EGR Flow), so checking the vacuum modulator using the FSM test procedure. Apparently, I can't tell the difference between air passing through to the filter side "freely" and "with strong resistance". So - convinced the modulator was...
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