P2334Ignition Coil L 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
- P2334, the last primary-side coil code of the series, reports a short to voltage on the coil L trigger line. No manufacturer documents this code publicly; it can only occur on engines with twelve individual coils. GM's comparable cylinder 8 code P2322 shows how such a check works: while the driver is on, the line voltage lies outside the controller's acceptable band, counted as a Type B fault with the MIL after two trips. Typical causes are a coil lead rubbing through onto a supply wire or a coil with internal leakage; on many V12 engines reaching the coils means removing covers or intake parts, which raises the labour time. P2333 is the ground-side counterpart.
- What you may notice
- Check engine light on
- Cylinder 12 intermittently dead
- Hardly noticeable loss of smoothness
- Likely causes
- LikelyCoil L control wire shorted to a voltage source
- PossibleCoil L internally faulty
- RareEngine module output for coil L 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 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.