P2302Ignition Coil A Secondary Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2302 looks at the high-voltage side of coil A – the secondary winding, the boot and the spark plug of cylinder 1 – rather than at the control line covered by P2300 and P2301. Only a few makers use it. FCA does on the 3.6-litre Pentastar V6 in 2015–2016 Dodge Caravan and Chrysler Town & Country vans, where the code name speaks of too little ionization on the secondary side of coil 1: the module judges combustion from the ion current across the plug gap, and a weak signal means the spark did not light the mixture properly. Bulletin 18-069-16 replaced the PCM on vans built between 27 July and 11 September 2015. Ford, by contrast, leaves even primary winding faults of its coil-mounted drivers to the misfire monitor, so they show up as P0301 or P0300. If misfire reaches a catalyst-damaging rate, CARB requires a flashing MIL.
- What you may notice
- Check engine light on
- Misfire on cylinder 1, often together with P0301
- Rough idle and hesitation
- Likely causes
- LikelyWorn or fouled spark plug in cylinder 1, gap too wide
- PossibleCracked coil boot letting the spark jump to the cylinder head
- PossibleSecondary winding of coil A breaking down
- RareIon-sense evaluation in the PCM (FCA 18-069-16: PCM replaced)
- 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: €30 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.