P2326Ignition Coil I 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
- P2326 would report a fault in the high-voltage output of coil I – coil, boot or plug of the ninth cylinder. No manufacturer documents this code publicly. FCA's ion-sensing secondary codes, the closest analogue, end at coil 8 (P2323), and Ford, the one maker with public coil I codes, monitors that coil only on its driver side (P2324/P2325). A system that set P2326 would have to judge spark quality on the plug, for example via ion current as in Saab's Direct Ignition, or via secondary voltage. In practice, a weak spark on a ten- or twelve-cylinder engine shows up through misfire detection, which CARB's OBD II rules require for every cylinder: expect P0309. Check plug, boot and coil on cylinder 9 first if the code ever appears.
- What you may notice
- Check engine light on
- Misfire on cylinder 9 (P0309)
- Hesitation under heavy load
- Likely causes
- LikelySpark plug on cylinder 9 worn or bridged
- PossibleCoil I boot perforated or oil-soaked
- PossibleCoil I secondary winding weak
- 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: €25 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.