P0351 Ignition Coil # 1 Primary Circuit

SYMPTOM
P-0351 IGNITION COIL # 1 PRIMARY CIRCUIT

WHEN MONITORED
With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running, and with engine rpm less than 2016, and none of the coils in dwell when checked.

SET CONDITION
Peak current is not achieved with battery based dwell plus 1.5 msec of diagnostic offset. It takes less than 3 seconds during cranking or up to 6 seconds while running to set.

POSSIBLE CAUSES
- ASD output circuit open
- IGN coil def
- Ignition coil connector defective
- Powertrain control module defective
- IGN coil # 1 wiring harn/conn intermittent defect
- IGN coil # 1 wiring harn/conn observable def
- Ignition coil driver circuit short to ground
- Ignition coil driver ckt open