Powertrain, generic (extended)

P2382 EGR Sensor D Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2382 reports that EGR sensor D delivers almost no signal voltage. In GM's 2025 diesel ECM tables this sensor measures the pressure difference across the low-pressure EGR path, and the code sets once the raw value drops below 0.02 % of range in 480 of 600 samples, sampled every 6.25 ms once the engine is out of cranking and the relay supply exceeds 11 V; it is a Type A fault with MIL on the first trip. Behind a reading that low there is usually a broken 5 V reference, a signal line shorted to ground or a sensor without output. For the 3.0L LM2 diesel, GM bulletin 21-NA-149 advises, for P2382 and P2383, pulling gently on each wire at the differential pressure sensor connector, since conductors may break there although they test good, and taping the harness afterwards. P2381 is the high-side code.

Likely causes

Conductor broken right at the sensor connector (GM 21-NA-149)
Open 5 V reference or signal shorted to ground
Differential pressure sensor without output

Symptoms

  • Check engine light on in the first trip
  • Low-pressure EGR switched off
  • Fault may come and go with engine vibration

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–300
Time0.3–2 h

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

Parts involved

egr sensor degr sensor wiring d

Related codes

P2380P2381P2383P2384P0405

References: gsi.ext.gm.com, static.nhtsa.gov, law.cornell.edu.