Diagnostic Aids

DTC P1374 can be caused by secondary components leaking high voltage into the IC module.

Check for any of the following conditions:

• Incorrect harness routing near secondary ignition components.
• Ignition coil arcing to wiring harness or IC module Inspect the ignition coils for 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.