EGR Position Sensor Circuit Low
The EGR position sensor circuit is reading a low voltage.
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 tells the engine computer how far the EGR valve is open. If the sensor shows a low voltage, the computer thinks the valve might be closed when it should be open.
What the computer is actually seeing
The engine control module sees a voltage drop in the EGR position sensor circuit, typically lower than 0.5 volts when it should be around 0.7 to 4.5 volts depending on the valve position.
What a healthy reading looks like
EGR position voltage should be 0.7 to 4.5 volts while driving, changing with the valve position. If at idle, look for around 0.7 volts if fully closed.
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 EGR position sensor connector for damage. If damaged, repair/replace the connector. Go to step 4.
- 22. Inspect the wiring between the EGR position sensor and engine control module for breaks or shorts. Repair if necessary. Go to step 4.
- 33. Measure the voltage at the EGR position sensor while the engine is running. If below 0.7 volts, replace the sensor. If above 0.7 volts, go to step 4.
- 44. Inspect the EGR valve operation manually. If it’s stuck, clean or replace as needed.
Common causes
- Damaged wiring or connector to EGR position sensor
- Faulty EGR position sensor
- Blocked or stuck EGR valve
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's driveable but might affect emissions and fuel economy. Fix it soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will reappear.
What happens if I ignore this code?
Ignoring it can lead to increased emissions, poorer engine performance, and potential damage to the EGR system.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →