Injection Pump Fuel Calibration Not Learned

Where it lives

For P2674, the part to look at first is the pump named here.

Check these first

• A recent battery disconnect that wiped the learned fuel calibration
• Low battery voltage during the previous learn cycle
• A failed fuel pressure sensor blocking the learn
• A failed crankshaft or camshaft position sensor blocking the learn

What to do next

1. Check battery voltage and charge as needed
2. Confirm live fuel pressure and position sensor data on a scan tool
3. Run the injection pump fuel calibration learn with the engine off
4. Verify the learned fuel calibration stores
5. Repeat the learn if the calibration does not store
6. Clear the code and retest

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