P2311
Ignition Coil D Secondary Circuit
A fault is detected in the secondary side of ignition coil D. Insufficient spark energy results in cylinder misfire.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Worn spark plugCommon
- Secondary winding failurePossible
Parts involved
- Ignition Coil
- Spark Plug
P2311 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.