DPFE Sensor Circuit Downstream Hose Fault
Findings, check these first
- Split or melted downstream DPFE hose
- Disconnected downstream hose
- Clogged downstream tap
- Hose collapsing under vacuum
- Wrong hose material failing from heat
Standard procedure
- Inspect both DPFE hoses end to end
- Replace with proper high-temp hose
- Clear the downstream tap
- Verify DPFE response after repair
- Secure hoses away from exhaust heat
Code lookup
Type a code above, or start from a symptom or a common code.
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Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1406 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1406: Exhaust Gas Recirculation (EGR) Position Sensor Performance
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1406 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1406: DPFE Sensor Circuit Downstream Hose
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-06.
Report a correction for P1406. Include your vehicle, the issue and a source if you have one.