P2323 code meaning
Ignition Coil H Secondary Circuit
Powertrain system Generic code P23xx codes Check engine light
What P2323 means
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 trunk doubles as a measuring path, so a loose connector, a cracked trunk 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.
P2323 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.2 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P2323
- Check engine light on
- Cylinder 8 misfire, frequently stored with P0308
- Rough running when accelerating
Common causes of P2323
- Most likelyCoil 8 connector loose or not latched (FCA)
- PossibleWorn or fouled spark plug on cylinder 8
- PossibleCoil H trunk cracked or tracking to the head
- Less likelyPCM ion-sense circuit faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ignition coilSpark plug
What each part of P2323 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 23 | The exact fault in that area. |
What to do next
- Note P2323 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2323
What does P2323 mean?
P2323 means "Ignition Coil H Secondary Circuit". P2323 concerns the spark side of coil H, the coil on cylinder 8. It is a generic code, so it means the same on every make.
Is it safe to drive with P2323?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2323 fail an emissions test?
Yes, it can. P2323 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2323 to fix?
Difficulty: medium. A typical repair takes 0.2 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2323 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.