Diagnostic Aids

If vehicle has non-standard electrical equipment (CB radios, 2-way radios, etc.) check to see if their operation may be causing a 7X resync which may set Code 19. If a "cranks but won't start" condition has existed, code may be due to 20 attempted starts without turning off ignition switch.

Fig 1: Code 19 Schematic (2.3L) Intermittent 7X Signal

Fig 2: Code 19 Flow Chart (2.3L) Intermittent 7X Signal