Exhaust Gas Recirculation (EGR) Control Position Sensor Circuit Low
EGR control signal is lower than expected.
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What it means (plain English)
The EGR system controls exhaust gases that go back into the engine. If the control signal for the EGR valve is low, the computer thinks it isn't working right and may not be able to reduce emissions properly.
What the computer is actually seeing
The ECU sees the EGR valve position less than 0.2 volts when it should be at least 0.5 volts. The ideal range should be between 0.5V and 4.5V depending on the vehicle's operation.
What a healthy reading looks like
Expected values for EGR position sensor voltage typically range from 0.5V (closed) to 4.5V (fully open) based on the engine load and RPM.
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. Check EGR wiring and connectors for damage or corrosion; repair if needed.
- 22. Measure the EGR sensor voltage with a multimeter. It should be between 0.5V and 4.5V; if not, replace the sensor.
- 33. Inspect the EGR valve operation by commanding it open and closed using a scan tool; verify it responds appropriately.
- 44. Check for DTCs in the ECU. If other relevant codes appear, address them before re-testing EGR functionality.
Common causes
- Faulty EGR valve position sensor
- Wiring issues (frayed, shorted)
- Poor ground connection
- Failed EGR valve
- Software error in the ECU
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but drivability and emissions will be affected; fix it soon.
Will this code come back after I clear it?
If the underlying issue isn’t fixed, yes, it will likely return.
Why does this code show up with other EGR codes?
EGR system faults often interact, causing multiple DTCs to set.
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