EGR Valve Position (EGRP)
The Electronic Control Unit (ECU) has detected an issue with the EGR valve position sensor.
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 computer can't figure out if the EGR valve is where it should be, suggesting either the valve is stuck or the sensor is faulty.
What the computer is actually seeing
The ECU measures the EGR valve position against a known good range. If it detects a position outside of that range or a lack of response, it triggers this code.
What a healthy reading looks like
The EGR valve position should vary between 0-100% based on engine conditions. Voltage output from the position sensor typically ranges from 0.5V (valve closed) to 4.5V (valve 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. Check the wiring and connectors on the EGR valve for damage or corrosion. Are they secure and undamaged?
- 22. Inspect the EGR valve for carbon buildup or blockages. Does it move freely when actuated?
- 33. Measure the voltage at the EGR position sensor while the engine is running. Is it within 0.5V to 4.5V?
- 44. If the voltage is out of range, replace the sensor. If it's within range but the EGR isn’t working, replace the EGR valve.
Common causes
- Faulty EGR valve
- Faulty EGR position sensor
- Wiring or connector issues in the EGR circuit
- Blocked EGR passages or intake
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It is moderate severity, so it's best to fix soon, but the vehicle may still be drivable.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return.
Why does it pair with SPN 631?
SPN 631 often indicates a related issue with the EGR system, such as performance faults.
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