P0273
Cylinder 2 Contribution/Balance
The ECU compares torque contribution of cylinder 2 against other cylinders by analyzing crankshaft angular velocity. Persistent low contribution triggers this code.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Injector flow lowCommon
- Low compression cylinder 2Possible
Parts involved
- Fuel Injector
- Ignition Coil
- Spark Plug
- Compression
P0273 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.