FixVault

Note On Intermittents

If fuel pump test point is grounded, the fuse will blow and Code EO20 will set. If necessary, replace fuse. Start engine and allow to idle. Manipulate affected wiring and connectors. If fault occurs, the fuse will blow and engine will stall.

Fig 1: ECM Code EO20 Circuit Diagram
G90D21728
Fig 2: ECM Code EO20 Flow Chart
G90A13698