P1406 - Exhaust Gas Recirculation (EGR) Position Sensor Performance
Downstream hose is disconnected.
Downstream hose is plugged (ice).
Plugged or damaged EGR tube.
- Engine Light ON (or Service Engine Soon Warning Light)
While driving, the EGR monitor commands the EGR valve closed and checks the differential pressure across the EGR orifice. The test fails when the signal from the DPF EGR sensor continues to indicate EGR flow even after the EGR valve is commanded closed.
P1406 Information for specific makes
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