Powertrain, generic (extended)

P2327 Ignition Coil J Primary Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2327 is the highest ground-side coil code Ford publishes: its driver short-circuit-low list in the 2012 and 2020–2023 OBD summaries runs from P2300 up to P2327 and stops there, matching a ten-coil engine such as the 6.8-litre Modular V10. Coil J serves the tenth cylinder in Ford's count. The check runs continuously between 200 rpm and about 3,200 rpm under positive torque and finishes in under a second; Ford's 2014 code list ranks it as a MIL code. Because Ford also cuts the injector of a faulty-coil cylinder, a grounded coil J line feels like a dead cylinder that keeps coming back. Engines with twelve cylinders could log it too, but no such maker documents it. Related: P0360 for an open circuit, P0310 for misfire on cylinder 10.

Likely causes

Coil J (cylinder 10) failed with internal short
Coil J signal wire shorted to ground near the rear of the engine
Corroded or water-filled coil J connector
PCM driver for coil J defective

Symptoms

  • Check engine light on
  • Cylinder 10 missing, engine shakes
  • Higher fuel consumption from cylinder shut-off cycles

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

P2328P2329P0360P2324P0310

References: fordservicecontent.com, newtonnet.co.uk, performanceparts.ford.com, en.wikipedia.org.