P2384 code meaning
EGR Sensor D Circuit Intermittent
Powertrain system Generic code P23xx codes Check engine light
What P2384 means
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.
P2384 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2384
- MIL on, often without noticeable driving change
- Code stored, cleared and returning after some drives
- EGR operation reduced as a precaution
Common causes of P2384
- Most 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)
- Less likelySensor with an internal contact fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EGR sensor dEGR sensor wiring d
What each part of P2384 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 84 | The exact fault in that area. |
What to do next
- Note P2384 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2384
What does P2384 mean?
P2384 means "EGR Sensor D Circuit Intermittent". P2384 marks an EGR sensor D signal that jumps or drops out for brief moments without staying at a fixed fault level. It is a generic code, so it means the same on every make.
Is it safe to drive with P2384?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2384 fail an emissions test?
Yes, it can. P2384 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2384 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2384 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.