Diagnostic Aids
DTC P1374 can be caused by secondary components leaking high voltage into the IC module.
Inspect for the following conditions:
- Incorrect harness routing near secondary ignition components.
- Ignition coil arcing to wiring harness or IC module. Inspect the ignition coils for the following conditions: Cracks, Carbon tracking and Other signs of damage.
- Secondary ignition wires arcing to the wiring harness.
- If the DTC is determined to be intermittent, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.