Diagnostic Aids

Inspect for the following conditions:

• An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. DTC P0351 through P0354 can set if there is a intermittent fault in any of the ignition coil circuits.
• If DTCs P0351, P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
• The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
• Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.