P1305 EGR Calibration Low

Category: Powertrain - Auxiliary Emissions Controls
Severity: Check Engine Light
Applies to: F-150, Ranger, Explorer, Taurus

What does P1305 mean on a Ford?

P1305 — EGR Calibration Low. This Ford-enhanced code applies to F-150, Ranger, Explorer, Taurus.

Common causes of P1305

Carbon-restricted EGR passages
Valve not opening fully
DPFE sensor biased low
Collapsed DPFE hose
Weak vacuum supply

How to fix P1305

Decarbonize passages and valve
Check DPFE hoses for collapse
Verify sensor accuracy
Test vacuum supply strength
Relearn after cleaning