P2308Ignition Coil C 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
- P2308 points at the high-voltage path of coil C, normally cylinder 3: winding, boot and plug. The code is uncommon. FCA's 3.6 V6 in the 2015–2016 Caravan and Town & Country calls it coil 3 secondary circuit with insufficient ionization. For vans built from late July to mid September 2015 FCA bulletin 18-069-16 swapped the PCM and flashed current software, keeping the battery between 13.2 and 13.5 V on a charger during the flash; the labour allowance is half an hour. Ford and GM tables list no secondary-circuit code for coil C at all; there a weak spark only becomes visible as misfire (P0303). Because each misfire sends unburned fuel into the exhaust, CARB requires the MIL to flash once misfire rates threaten the catalyst. Check plug and boot before suspecting the module.
- What you may notice
- Check engine light on
- Misfire on cylinder 3 with P0303 stored
- Engine runs rough
- Likely causes
- LikelySpark plug of cylinder 3 worn or fouled
- PossibleBoot of coil C leaking high voltage
- PossibleFCA vans built 27 July–11 September 2015: PCM fault (bulletin 18-069-16)
- RareCoil C secondary winding 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: €30 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.