P2384EGR Sensor D Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2384 marks an EGR sensor D signal that jumps or drops out for brief moments without staying at a fixed fault level. GM's 2025 diesel ECM tables apply it to the differential pressure sensor of the low-pressure EGR loop: when two successive raw readings differ by more than 10 % in 300 out of 600 samples, taken every 6.25 ms with the relay supply above 11 V and no high or low circuit fault present, a Type A fault is logged and the MIL comes on in the first trip. GM bulletin 20-NA-039 lists P2384 among several codes on 2020 Silverado and Sierra 1500 trucks with the 3.0L LM2 diesel that a software anomaly could cause, cured by ECM reprogramming. Outside such cases loose terminals and chafed wiring are typical; P2381 to P2383 are the steady faults.
- What you may notice
- MIL on, often without noticeable driving change
- Code stored, cleared and returning after some drives
- EGR operation reduced as a precaution
- Likely causes
- LikelyLoose or corroded terminals at the EGR sensor D connector
- PossibleHarness chafing intermittently on engine or exhaust parts
- PossibleECM software anomaly (GM 3.0L LM2 2020, bulletin 20-NA-039)
- RareSensor with an internal contact fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.