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EMRSR, Master Certified Service Manager
Category: Ford
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Experience:  20 years with Ford, Master Certified
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What is code P1406 on a 2000 Ford Focus for

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What is code P1406 on a 2000 Ford Focus for?

Attached is a lot of information, but likely just nedd a DPFE Sensor and replace the hoses to them. Very common.



Tests HE: Exhaust Gas Recirculation (EGR) Systems

Exhaust Gas Recirculation (EGR) System

This Pinpoint Test is intended to diagnose the following:

  • Differential pressure feedback EGR sensor
  • Exhaust Gas Recirculation (EGR) valve
  • EGR vacuum regulator solenoid
  • Orifice tube assembly
  • Differential pressure feedback EGR sensor pressure hoses
  • Vacuum lines
  • Harness circuits: VREF, DPFE, SIG, SIG RTN, EVR, EVR PWR
  • Powertrain Control Module (PCM)

Pinpoint Test Schematics and Connectors

Taurus/Sable 3.0L 4V (Differential Pressure Feedback EGR Sensor)

LS6/LS8 (Differential Pressure Feedback EGR Sensor)

All Others (Differential Pressure Feedback EGR Sensor)

LS6/LS8 (EGR Vacuum Regulator Solenoid)

All Others (EGR Vacuum Regulator Solenoid)

Pinpoint Tests

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