P2327Ignition Coil J Primary Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Check engine light on
- Cylinder 10 missing, engine shakes
- Higher fuel consumption from cylinder shut-off cycles
- Likely causes
- LikelyCoil J (cylinder 10) failed with internal short
- PossibleCoil J signal wire shorted to ground near the rear of the engine
- PossibleCorroded or water-filled coil J connector
- RarePCM driver for coil J defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.