P2383EGR Sensor D Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2383 flags an EGR sensor D whose signal is electrically fine but makes no sense. Two published strategies show how differently makers test it. GM's 2025 diesel ECM tables check the low-pressure EGR differential pressure sensor at key-off, when there should be no pressure difference: if the averaged reading exceeds 6 %, a Type A fault is set at once, provided no circuit or intermittent fault is present. Ford's 2024–2025 petrol summary uses P2383 for reversed hoses on its EGRP pressure sensor, judged by a signal off by more than 10 kPa or an internal temperature off by more than 27.7 °C for 5 seconds. GM bulletin 21-NA-149 adds harness checks at the sensor connector on 3.0L LM2 trucks. Mixed-up or cracked hoses, a drifting sensor and soot in the lines are the usual suspects.
- What you may notice
- Check engine light on
- EGR rate reduced or switched off
- Often appears after work on the EGR or exhaust system
- Likely causes
- LikelySensor hoses swapped, cracked or disconnected (Ford EGRP)
- PossibleSensor drifted so that it reads a pressure difference with the engine off (GM)
- PossibleSensing lines blocked by soot or condensate
- RareIntermittent wire break at the sensor connector (GM 21-NA-149)
- 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: €10 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.