Hello all, civic will push start but dead on key. Fault code p1615 stored. injector drive voltage too low. Any ideas? Battery fully charged.

 

You mean it cranks but won't start? Could be the ignition switch is bad, cutting power to the fuel circuit when in start but not at run.

If it doesn't crank at all do the usual checks of the battery, starter, and interlocks (clutch switch or neutral switch).