P2180
System Too Rich Off Idle Bank 2
Bank 2 fuel trim shows a rich shift during off-idle conditions. The ECU subtracts fuel to maintain proper combustion. Common causes are stuck injectors or excess fuel pressure.
- 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.
- Leaking injector on bank 2Common
- Excessive fuel pressurePossible
Parts involved
- Fuel Injector
- Fuel Pressure Regulator
- EVAP Purge Valve
P2180 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.