Powertrain, generic (extended)

P2386 EGR Sensor E Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2386 says the signal of EGR sensor E sits at or above the upper end of its electrical range. With a typical three-wire 5 V pressure or position sensor that happens when the ground is open or the signal line touches a supply voltage; on a temperature sensor wired as a pull-up, an open circuit shows the same picture. No manufacturer documents P2386 publicly. The pattern GM publishes for sensor D on its 2025 diesels gives a sense of scale: P2381 sets once the raw value exceeds 99.83 % of range in 480 of 600 samples, as a Type A fault. CARB asks for out-of-range checks on EGR monitor inputs. P2387 is the low-side counterpart. Expect the MIL and reduced or disabled EGR; the engine itself normally runs on.

Likely causes

Open sensor ground wire or ground terminal
Signal wire shorted to 5 V reference or battery voltage
Sensor output stuck high internally

Symptoms

  • MIL on
  • EGR shut off or reduced
  • Scan data shows sensor E at full scale

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–300
Time0.3–2 h

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

Parts involved

egr sensor e

Related codes

P2385P2387P2388P2381

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