P1304 EGR Calibration High
What does P1304 mean on a Ford?
P1304 — EGR Calibration High. This Ford-enhanced code applies to F-150, Ranger, Explorer, Taurus.
Common causes of P1304
- Excessive EGR flow from a sticking-open valve
- DPFE sensor biased high
- Missing EGR restrictor after service
- Vacuum fault holding the valve open
- Calibration drift
How to fix P1304
- Check the valve for sticking open
- Verify DPFE readings
- Confirm correct restrictor and gaskets fitted
- Test vacuum controls
- Relearn calibration after repairs