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SPN 2813moderate severity✨ AI-generated

EGR Position Sensor Circuit Low Voltage

The EGR position sensor is sending a low voltage signal to the ECM.

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 EGR position sensor, which tells the engine computer how far the exhaust gas recirculation valve is opening, is showing a voltage drop below normal, indicating a problem with the sensor or its circuit.

What the computer is actually seeing

The ECM expects to see a voltage signal typically between 0.5V to 4.5V, depending on the valve position, but it’s only registering below 0.5V, indicating an issue that could be wiring, connector, or sensor related.

What a healthy reading looks like

EGR position sensor voltage should be between 0.5V (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.

  1. 11. Check the EGR position sensor connector for corrosion or damage. Fix as necessary and retest the circuit.
  2. 22. Use a multimeter to check the voltage at the EGR position sensor. What voltage are you reading?
  3. 3- If voltage is below 0.5V, check for wiring issues in the harness leading to the ECM. Repair as necessary.
  4. 4- If voltage is normal (0.5V - 4.5V), proceed to step 3.
  5. 53. Test the EGR position sensor itself by applying vacuum to the EGR valve and observing the voltage change. Does it respond as expected?
  6. 6- If it doesn't respond, replace the EGR position sensor.
  7. 7- If it responds properly, the issue may be within the ECM.

Common causes

  • Faulty EGR position sensor
  • Wiring issue or short circuit
  • Corroded or loose connector terminals
  • Faulty ECM

Typical repair cost

$$$

Related codes

SPN 2809SPN 2810SPN 2811SPN 2812SPN 2814

Frequently asked questions

Is it safe to drive with this code?

It's variable; it may impact emissions, so it's better to fix it soon.

Will the code come back after I clear it?

If the underlying issue isn’t resolved, it likely will return.

Why does this code show up with SPN 2811?

They both relate to EGR system performance; if one fails, it can affect the other.

Working a real vehicle right now?

Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.

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