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 none of the coils in dwell when checked.

SET CONDITION
Peak current is not achieved with 2.5ms of dwell. It takes 3 seconds during cranking or up to 6 seconds while running to set.

POSSIBLE CAUSES
- ASD output circuit open
- Ignition coil #1 connector terminal observable def
- Ignition coil #1 driver circuit open
- Ignition coil #1 driver circuit shorted to ground
- Ignition coil circuit wiring harness intermittent defect
- Ignition coil circuit wiring harness observable defect
- Ignition coil #1 resistance above 2.0 ohms
- PCM defective (ign coil #1)