MBE 900 DDEC VI Troubleshooting – Section 42 SPN 558 – Idle Validation Switch Email This Page Section 42 SPN 558 - Idle Validation Switch 42.1 SPN 558/FMI 1 42.2 SPN 558/FMI 3 42.3 SPN 558/FMI 4 EPA07 MBE 900 DDEC VI Troubleshooting Guide - 6SE580 Generated on 10-13-2008