EGR Position Sensor - Signal Out of Range
The EGR position sensor is reporting an invalid voltage signal.
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 is supposed to tell the engine control module (ECM) how far the EGR valve is opening; when it sends a signal that doesn't make sense, the engine can't adjust the exhaust flow properly.
What the computer is actually seeing
The ECM expects the EGR position sensor to produce a voltage signal typically between 0.5V (closed position) and 4.5V (fully open). Seeing a voltage below 0.2V or above 4.8V indicates a fault.
What a healthy reading looks like
EGR position sensor voltage should read between 0.5V and 4.5V while operating; closed position should be around 0.5V, and fully open should approach 4.5V.
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 all wiring and connectors to the EGR sensor for damage or corrosion. Repair or replace as necessary. Does the wiring look good?
- 22. Measure the voltage at the EGR position sensor while the engine is running. Is it within 0.5V to 4.5V?
- 33. If the voltage is out of range, replace the EGR position sensor. Did the code clear after replacement?
- 44. If the signal is good and the wiring is intact, check the EGR valve functionality. Is the valve opening and closing when commanded?
- 55. If all components check out, consider ECM issues as a last resort.
Common causes
- Faulty EGR position sensor
- Wiring issues in the EGR circuit
- Faulty EGR valve
- Air leaks in the EGR system
- ECM fault
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's a moderate severity code, so it's best to address it soon to prevent driving issues and emissions problems.
Will this code come back after I clear it?
If the underlying issue isn't fixed, yes, the code will come back.
Why does this code sometimes pair with other codes?
Often, multiple codes can point to related issues in the EGR system; a fault in one part can affect others.
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