P2382EGR Sensor D Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- 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.
- What you may notice
- Check engine light on in the first trip
- Low-pressure EGR switched off
- Fault may come and go with engine vibration
- Likely causes
- LikelyConductor broken right at the sensor connector (GM 21-NA-149)
- PossibleOpen 5 V reference or signal shorted to ground
- PossibleDifferential pressure sensor without output
- 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: €30 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.