Powertrain, generic (extended)

P2388 EGR Sensor E Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2388 covers an EGR sensor E whose signal is electrically valid but does not agree with what the engine controller expects from the operating state. Typical tests compare the reading with a known condition, such as zero pressure difference with the engine off, or with a modelled value from other sensors. No manufacturer documents P2388 publicly. Published sensor D logic shows the approach: GM's 2025 diesels flag P2383 if the low-pressure EGR differential pressure exceeds 6 % at key-off, while Ford's 2024–2025 petrol engines use P2383 for swapped hoses at the EGR pressure sensor. Plugged or cracked sensing hoses, soot build-up and sensor drift are the usual culprits rather than wiring. The car drives normally, but the EGR monitor cannot complete.

Likely causes

Sensing hoses blocked, cracked or swapped
Soot deposits at the sensor port
Sensor drifted out of calibration

Symptoms

  • MIL on
  • EGR monitor readiness not set
  • Sensor E reading implausible at engine off

Repair estimate

DifficultyMediumDIY possible
Parts and labour€10–350
Time0.3–2 h

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

Parts involved

egr sensor e

Related codes

P2385P2389P2383P0401

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