P2320Ignition Coil G 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
- 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.
- What you may notice
- Check engine light on
- Misfire felt on cylinder 7, often with P0307
- Engine shakes at idle or under load
- Likely causes
- 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 boot breaking down
- RareIon-current evaluation in the PCM 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.