P2389EGR Sensor E Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2389 points to an EGR sensor E signal that is mostly plausible but now and then jumps, spikes or drops out. Engine controllers detect this by watching the rate of change between consecutive readings rather than absolute limits. No manufacturer documents P2389 publicly; the nearest published example is GM's sensor D code P2384 on 2025 diesels, which counts readings that change by more than 10 % from one sample to the next and sets a Type A fault after 300 such events in 600 samples. Such faults tend to follow engine vibration, heat cycles or moisture, so connector locks, pin tension and harness routing near hot exhaust parts deserve the first look. A fault that is absent during testing may still return; P2385 to P2387 describe steady faults.
- What you may notice
- MIL on, sometimes going out again
- Fault cannot be reproduced at the workshop
- Jumps visible in the sensor E data stream
- Likely causes
- LikelyWeak pin tension or unlatched connector
- PossibleHarness damaged by heat or rubbing near the exhaust
- PossibleMoisture in the connector
- RareSensor with an intermittent internal 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.