P054E
Idle Control System Fuel Quantity Lower Than Expected
At idle the ECU expects a calibrated fuel quantity to maintain set-speed. The actual quantity is significantly less than modelled - typical for a tight engine, very low friction, dragging accessory load missing, or implausible idle airflow.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Expected accessory load missingCommon
- Idle airflow offsetPossible
Parts involved
- Idle Control Strategy
- Fuel Metering
P054E 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.