EGR Control Valve Position Sensor Circuit Low
The EGR control valve position sensor is reporting a low voltage.
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)
Inside the engine's computer system, the EGR (Exhaust Gas Recirculation) valve position sensor measures how open or closed the EGR valve is. If this sensor reports a voltage that’s too low, the computer thinks the valve isn’t moving properly, which can lead to increased emissions or engine performance issues.
What the computer is actually seeing
The computer expects to see a voltage between 0.5V to 4.5V from the EGR control valve position sensor. If the voltage drops below 0.5V, the code is triggered.
What a healthy reading looks like
EGR valve position sensor output should be between 0.5V (fully closed) and 4.5V (fully open).
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 EGR valve and its connections for signs of damage or corrosion. Decision: Is the wiring and connector intact? If yes, go to step 2. If no, repair the wiring/connectors and retest.
- 22. Check the EGR control valve position sensor's output voltage. Use a multimeter to measure the voltage while the engine is running. Decision: Is the voltage between 0.5V and 4.5V? If yes, the issue may not be with the sensor. If no, replace the sensor and retest.
- 33. Verify the EGR valve operation by applying vacuum or applying power directly. Decision: Does the EGR valve operate freely? If yes, the control valve may be faulty. If no, replace the EGR valve.
Common causes
- Damaged wiring or connectors in the EGR valve circuit
- Faulty EGR control valve position sensor
- Malfunctioning EGR valve
- Poor ground connection for the EGR system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's usually safe to drive, but expect reduced performance and possibly increased emissions.
Will this code come back after clearing?
If the underlying issue isn’t fixed, the code will likely return.
Why does this code appear with other EGR codes?
EGR issues often cause multiple faults; they may stem from the same electrical problems or a failing EGR system.
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 →