EGR Position Sensor Circuit High Voltage
Indicates a high voltage signal from the EGR position sensor.
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What it means (plain English)
The EGR position sensor is sending a signal that is too high, which may mean it's faulty or there's a wiring issue.
What the computer is actually seeing
The Engine Control Module (ECM) expects a certain voltage range from the EGR position sensor, typically around 0.5V to 4.5V depending on the position. A reading above the expected range, often over 4.5V, triggers this fault.
What a healthy reading looks like
EGR position sensor should read 0.5V (closed) to 4.5V (fully open). If the voltage exceeds 4.5V, or varies wildly, it's problematic.
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 wiring and connectors to the EGR position sensor. Look for frayed wires or poor connections. Fix any issues found.
- 22. Measure the voltage at the EGR position sensor with the key on (engine off). Expect 0.5V to 4.5V. If it's over 4.5V, continue to step 3.
- 33. Disconnect the EGR position sensor. Retest the voltage; it should drop to 0V. If it does, the sensor is likely faulty. If the voltage remains high, the circuit has a short.
- 44. Replace the EGR position sensor if faulty. Clear the code and retest the system.
Common causes
- Faulty EGR position sensor
- Wiring/connector issues between the sensor and ECM
- Short circuit to power in the sensor circuit
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you can drive, but fix it soon to prevent further issues.
Will this fault code come back after repair?
If the root cause is addressed, it should not come back.
Why do I see this code paired with SPN 1707 or 1709?
These codes are related to the same EGR system and can indicate different faults in the circuit or sensor.
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