Powertrain, generic · Auxiliary emission controls

P04E7 EGR Temperature Sensor D Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Exhaust gas recirculation (EGR) routes part of the exhaust back into the intake to lower combustion temperature and NOx. Sensor D is the fourth of up to four EGR temperature sensors, conceivable on engines with high- and low-pressure EGR and a sensor before and after each cooler; it is usually an NTC whose low voltage means hot. No manufacturer document available to us uses sensor D; the description follows CARB and Ford's checks on sensor B as a comparison. P04E7 means the signal is below its lower limit – a signal line shorted to ground or, theoretically, an extremely high temperature. For sensor B Ford uses below 0.19 V. A substitute value is used and EGR may be reduced.

Likely causes

Signal line chafed against ground or the engine
Sensor shorted internally
Water or corrosion in the connector
Module input faulty

Symptoms

  • Check engine light on
  • Usually no change in driving
  • EGR possibly reduced, higher NOx

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–250
Time0.5–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

egr temperature sensor dsensor wiringengine control module

Related codes

P04E5P04E6P04E8P04D0P041C

References: law.cornell.edu, fordservicecontent.com.