Pcm Code P012 - No Distributor (Tach) Signal: Notes

PCM checks for CAM HI pulses being received without REF HI (distributor) reference pulses. If PCM senses no reference pulses, engine will not start because fuel delivery system is triggered by pulses and Code P012 is set.

Possible causes of "no distributor reference signal" are:

1. Open or short in circuit No. 430 from ignition control module to PCM.
2. Ignition control module is unable to process pick-up coil signals to produce distributor reference pulses.
3. Grounding screw is located on metal tab attached to plastic fitting on 5-wire harness.