Bond OBD Trouble Code 27

Quad-driver module (computer) 2nd gear circuit

Injector # control circuit
Injector number # output driver circuit does not respond to the control signal. Check the affected circuit.

Fuel injection circuit control

Injector circuit isn't switching when it's told to (TBI)
(MPI) injector circuit #1 not switching right
(turbo) injector circuit #2 not switching right
(all 1990-) injector output driver

Injector output driver does not respond properly to the control signal or injector