P2387 code meaning
EGR Sensor E Circuit Low
Powertrain system Generic code P23xx codes Check engine light
What P2387 means
P2387 is stored when the signal of EGR sensor E falls below its valid electrical range. On a pressure sensor with a 5 V reference that typically points to a lost reference feed, a signal wire shorted to ground or a sensor that no longer drives its output; a shorted thermistor would produce the same result on a temperature input. No manufacturer documents P2387 publicly. GM's published limit for the comparable sensor D code P2382 on 2025 diesels is a raw value below 0.02 % of range in 480 of 600 samples, sampled every 6.25 ms after cranking. Because a dead 5 V reference often feeds several sensors at once, other low codes sharing that rail are a useful clue. P2386 covers the high side; EGR usually runs in a fallback mode meanwhile.
P2387 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 P2387
- MIL on
- Further low-voltage codes on sensors sharing the same reference
- EGR in fallback mode
Common causes of P2387
- Most likely5 V reference open or pulled down by another sensor
- PossibleSignal wire shorted to ground
- PossibleSensor without output signal
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EGR sensor e
What each part of P2387 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. |
| 87 | The exact fault in that area. |
What to do next
- Note P2387 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 P2387
What does P2387 mean?
P2387 means "EGR Sensor E Circuit Low". P2387 is stored when the signal of EGR sensor E falls below its valid electrical range. It is a generic code, so it means the same on every make.
Is it safe to drive with P2387?
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 P2387 fail an emissions test?
Yes, it can. P2387 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 P2387 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 P2387 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.