P2E6B
System Too Rich During Cylinder Deactivation Bank 2
During cylinder deactivation on bank 2, the fuel trim of the active cylinders runs persistently rich. Indicates excess fuel delivery or injector leakage.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Increased fuel consumption
- Black smoke from exhaust on acceleration
- Smell of unburned fuel, fouled spark plugs
Common causes
Ordered by how often each turns out to be the cause.
- Injector leak on active cylindersCommon
- Deactivation partial - residual combustionPossible
Parts involved
- Fuel Injectors
- Deactivation Solenoids
- Intake System
P2E6B 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.