Powertrain, generic · Auxiliary emission controls

P044E EGR Sensor C Circuit Intermittent/Erratic

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. What EGR sensor C is depends on the maker: on Ford petrol engines from 2020 it is the DPFE sensor, which measures the pressure drop across an orifice in the EGR pipe (sensor A there is the valve position sensor); GM diesels assign it to the position sensor of a low-pressure EGR valve, but only within fault groups. P044E means short dropouts or jumps in its signal, too brief for P044C/P044D or with an impossible rate of change. No manufacturer document available to us uses this code; Ford applies the same idea to sensor A as P046D, where a limit violation of only 0.4 s counts. EGR diagnosis is then suspended.

Likely causes

Loose contact in the connector or broken wire
Condensate in the sensor or hose (DPFE)
Sensor unstable internally
Interference or ground problems

Symptoms

  • Check engine light on, may come and go
  • Usually no driving symptom
  • Code returns after clearing

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–250
Time0.5–2 h

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

Parts involved

egr sensor cdpfe sensorsensor wiringengine control module

Related codes

P044AP044BP044CP044DP046D

References: law.cornell.edu, fordservicecontent.com, gsi.ext.gm.com.