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.

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 relay output circuit open
- IGN coil # 1 wiring harn/conn intermittent defect
- IGN coil # 1 wiring harn/conn observable def
- Ignition coil # 1 driver circuit open
- Ignition coil # 1 driver circuit shorted to ground
- Ignition coil connector terminal obser def
- Ignition coil def
- PCM defective (# 1 ignition coil circuit driver)