EGR Delta Pressure Sensor Circuit Low
Indicates an issue with the EGR delta pressure sensor circuit being too low.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine's computer measures the pressure difference across the EGR valve to control exhaust gas recirculation. A low pressure reading means the sensor might be faulty or there's a problem with the wiring.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage signal from the EGR delta pressure sensor. It expects to see a voltage between 0.5V and 4.5V. If the signal drops below 0.5V, it triggers this fault code.
What a healthy reading looks like
Normal EGR delta pressure sensor output voltage should range from 0.5V (no flow) to 4.5V (max flow). Ideally, at idle with EGR functioning, it should be around 1.2V.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors at the EGR delta pressure sensor for damage or corrosion. Fix as needed. If wiring is good, proceed to step 2.
- 22. Check the EGR delta pressure sensor output with a multimeter. At idle, check for about 1.2V. If voltage is below 0.5V, replace the sensor.
- 33. If replacing the sensor didn't resolve the code, inspect the EGR valve for proper operation. Make sure it opens and closes without physical restriction. If it’s stuck, replace it.
- 44. Lastly, check the EGR passages for any blockages using compressed air or a visual inspection. Clean if clogged.
Common causes
- Faulty EGR delta pressure sensor
- Wiring issues or connectors to the sensor
- EGR valve malfunction
- Clogged EGR passages
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but may cause increased emissions and reduced performance. Fix it soon.
Will this code come back after clearing?
If the underlying issue isn’t resolved, this code will reappear.
Why does it pair with other codes?
It often arises from similar issues in the EGR system, affecting related sensors or valves.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →