P2320 code meaning
Ignition Coil G Secondary Circuit
Powertrain system Generic code P23xx codes Check engine light
What P2320 means
P2320 points at the high-voltage half of coil G, normally the coil on cylinder 7, so only engines with seven or more cylinders can log it. FCA is the maker on record: STAR case S2118000002 from March 2021 for the 2020–2021 Ram 1500 names P2320 as coil 7 secondary circuit with insufficient ionization. Insufficient ionization means the PCM saw too little ion current across the plug gap after the spark, a sign of weak or missing combustion in that cylinder. FCA's first step is a pull-push-pull check of the coil connector to see whether it is fully seated and locked, followed by normal diagnosis if the code returns. A shorted control wire on the same coil instead sets P2318/P2319, an open one P0357. Expect a rough-running engine and often P0307 alongside.
P2320 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 P2320
- Check engine light on
- Misfire felt on cylinder 7, often with P0307
- Engine shakes at idle or under load
Common causes of P2320
- Most likelyCoil 7 connector not fully seated or latched (FCA)
- PossibleSpark plug of cylinder 7 worn, fouled or with wrong gap
- PossibleCoil G secondary winding or trunk breaking down
- Less likelyIon-current evaluation in the PCM 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 P2320 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. |
| 20 | The exact fault in that area. |
What to do next
- Note P2320 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 P2320
What does P2320 mean?
P2320 means "Ignition Coil G Secondary Circuit". P2320 points at the high-voltage half of coil G, normally the coil on cylinder 7, so only engines with seven or more cylinders can log it. It is a generic code, so it means the same on every make.
Is it safe to drive with P2320?
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 P2320 fail an emissions test?
Yes, it can. P2320 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 P2320 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 P2320 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.