Powertrain, generic (extended)

P2328 Ignition Coil J Primary Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2328 marks the end of Ford's published coil list: it is the last entry in the driver short-circuit-high group of the 2012 and 2020–2023 OBD summaries, and the 2014 Ford code list puts it directly before the evaporative codes with a MIL flag. It tells you the switching wire of coil J, the tenth coil, carries voltage where the driver expects a path to ground, or that the coil draws a current outside the allowed window. The protective logic is the same as for the other Ford coils – fuel to that cylinder is withdrawn for 30 s and restored – while internal module faults of the coil driver IC are reported separately as P06D1. Use a wiring diagram for the V10 to find where the coil J lead runs next to battery feeds.

Likely causes

Coil J control wire shorted to battery voltage
Coil J drawing abnormal current
PCM output for coil J damaged

Symptoms

  • Check engine light on
  • Cylinder 10 switched off at intervals
  • Engine runs rough and pulls weakly

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–450
Time0.3–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition coilcoil driverignition wiring

Related codes

P2327P0360P2325P06D1P0310

References: newtonnet.co.uk, performanceparts.ford.com, fordservicecontent.com.