P2331Ignition Coil K Primary Control Circuit High
- 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
- P2331 is the short-to-power version for coil K, cylinder 11 in a straightforward count. No manufacturer documents this code publicly; neither Ford nor GM, whose OBD descriptions explain the primary codes in detail, build engines with eleven or more coils. By analogy with Ford's description of P2301 to P2328, the driver would register current or voltage above the short-circuit limit while switched, and many systems then disable the injector of that cylinder to keep raw fuel out of the catalysts – Ford does this for 30 s at a time. On a V12 the loss of one cylinder is subtle, so the warning light may be the first sign. Look for a coil lead rubbing against a supply wire and for a coil with internal leakage; the low-side partner is P2330.
- What you may notice
- Check engine light on
- Cylinder 11 may be fuel-cut temporarily
- Slightly uneven idle
- Likely causes
- LikelyCoil K signal wire shorted to a supply wire
- PossibleCoil K with internal leakage
- RareEngine module output for coil K defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.