EGR Position Sensor Voltage Circuit Low
The EGR position sensor voltage is lower than expected.
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What it means (plain English)
The EGR (Exhaust Gas Recirculation) position sensor is sending a low voltage signal, which usually means it's either bad or there's a wiring issue.
What the computer is actually seeing
The ECM (Engine Control Module) expects EGR position sensor voltage to be between 0.5V and 4.5V. If it sees a voltage below 0.5V for more than 2 seconds, it triggers this fault code.
What a healthy reading looks like
EGR position sensor should show a voltage between 0.5V (closed) and 4.5V (fully open) during operation.
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.
- 1Check the wiring and connectors for the EGR position sensor for damage or corrosion.
- 2With the key on and engine off, check the voltage at the EGR position sensor connector; you should see a minimum of 0.5V.
- 3If the voltage is too low, check for a short to ground or open circuit between the sensor and ECM.
- 4If wiring and connections are good, try replacing the EGR position sensor; clear the code and test drive.
- 5If the code returns, further inspect the ECM and related software for issues.
Common causes
- Faulty EGR position sensor
- Wiring issues or bad connectors
- Ground circuit issues
- ECM software glitches
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but you might experience reduced performance or increased emissions, so fix it soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why is this code often seen with other EGR codes?
EGR-related codes often appear together due to shared components and systems affecting each other.
Working a real vehicle right now?
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