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2011 FORD FIESTA
1.6L I4•FWD•DCT•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor496Torque4305Fluid7DTC1127Battery1Maintenance0Recalls3
P1400moderate severityPowertrain

DPFE Sensor Circuit Low Input

on 2011 Ford Fiesta 1.6L I4 · FWD

What this code means

The Differential Pressure Feedback EGR (DPFE) sensor circuit is reading below the minimum expected voltage. The DPFE sensor measures exhaust gas flow through the EGR valve by detecting pressure difference across an orifice in the EGR tube.

Symptoms

  • Check Engine Light
  • Rough idle
  • Stalling
  • Poor fuel economy
  • Failed emissions test

Common causes

  • Faulty DPFE sensor (most common)
  • Clogged DPFE sensor hoses
  • Wiring short to ground
  • Corroded DPFE sensor from moisture
  • EGR passage blockage

Diagnostic steps

  1. Check DPFE sensor voltage with key on engine off (should be 0.45-0.55V)
  2. Inspect DPFE sensor hoses for cracks or blockage
  3. Test DPFE sensor wiring for shorts
  4. Check for carbon buildup in EGR passages

Repair notes

Replace DPFE sensor (most common fix — they fail from moisture corrosion). Inspect and clean EGR passages.

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