P2311: Ignition Coil D Secondary Circuit
Do not keep driving
Stop if the engine light is flashing. Ask when the plugs were last changed before a coil is fitted, and note whether the fault only appears once the engine is warm.
What this code means
A fault on the high-voltage output side of coil D. The spark plug argument is at P2302 and the heat pattern at P2309 — a secondary breakdown is more likely hot than cold, so this is another that may not reproduce on a cold engine.
Likely causes
Start here
- Worn or fouled spark plugs · easy
- Faulty ignition coil · easy
- Coil insulation breaking down when hot · easy
Less common
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
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