P2674
Injection Pump Fuel Calibration Not Learned
The injection pump fuel quantity calibration did not complete successfully. Without learned fuel calibration, AFR runs from default tables and emissions or smoke can rise.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Learning routine aborted by other DTC or unstable conditionsCommon
- Fuel quantity solenoid drift outside learning windowPossible
Parts involved
- Injection Pump
- Control Module
- Fuel Quantity Solenoid
P2674 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.