Diagnostic Aids

An intermittent 24X signal error can be caused by poor connections. Ignition feed, reference low and signal circuits should all be checked for poor connections.

Fig 1: Code P0321 Schematic (3.4L) Ignition Control 24X Signal Circuit Error

Fig 2: Code P0321 Flow Chart (3.4L) Ignition Control 24X Signal Circuit Error

Fig 3: Code P0321 Flow Chart