P0360: Ignition Coil J Primary Control Circuit/Open

What does P0360 mean?

P0360 monitors the primary control circuit of ignition coil J – the line from the engine module to the coil or to its built-in output stage – for an open circuit or high resistance. Coil J usually serves cylinder 10, so the code only occurs on engines with at least 10 cylinders. GM does not use the code (at most eight cylinders). Ford uses coils I and J on its 6.8-litre V10 in vans, pickups and motorhome chassis. Ford checks continuously from 200 rpm within 1 s, expecting a primary-current feedback for every ignition command, and then shuts off injection to that cylinder for 30 s at a time to protect the catalyst. Ford's PCM code list (Roush workshop manual for the V10) shows the code with check engine light. Short circuits have their own codes (P2327 ff).

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine light on
• Misfire and rough running on cylinder 10, often also P0310
• Loss of power, jerking under load
• Cylinder shut off (injection off), risk to the catalyst if driven on

Common causes

• High Ignition coil J faulty (output stage in the coil or primary winding open)
• High Connector at the coil corroded, wet or with a loose pin
• Medium Control, supply or ground wire open or chafed
• Low Driver in the engine module faulty or software (permanent dwell)

Likelihood is a general estimate across vehicles; your make and model may differ.