P2323Ignition Coil H Secondary Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2323 concerns the spark side of coil H, the coil on cylinder 8. It is the last code of FCA's ion-sensing series: STAR case S2118000002 (2021) for the 2020–2021 Ram 1500 reads it as coil 8 secondary circuit with insufficient ionization, and an older FCA parts review lists it together with the cylinder misfire codes P0301–P0308. On such systems the coil boot doubles as a measuring path, so a loose connector, a cracked boot or a worn plug can weaken the ion signal just as a failing coil can. FCA asks technicians to reseat and lock the connector first and only then to work through the regular test plan. GM and Ford, which use coil H codes on their V8s, document only the primary side (P2321/P2322); misfire on cylinder 8 is P0308.
- What you may notice
- Check engine light on
- Cylinder 8 misfire, frequently stored with P0308
- Rough running when accelerating
- Likely causes
- LikelyCoil 8 connector loose or not latched (FCA)
- PossibleWorn or fouled spark plug on cylinder 8
- PossibleCoil H boot cracked or tracking to the head
- RarePCM ion-sense circuit faulty
- 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: €20 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.