EGR Position Sensor Circuit Low Voltage
The EGR position sensor is reporting a low voltage condition.
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What it means (plain English)
The EGR (Exhaust Gas Recirculation) system is designed to reduce emissions by recirculating a portion of exhaust back into the engine. When the computer sees low voltage from the EGR position sensor, it thinks there's a problem with the EGR valve position, affecting how much exhaust is being recirculated.
What the computer is actually seeing
The engine control module (ECM) monitors the EGR position sensor voltage. A normal range is typically between 0.5 volts (closed) to around 4.5 volts (fully open). If the voltage drops below 0.1 volts or remains below normal for too long, the ECM triggers the fault code.
What a healthy reading looks like
EGR Position Sensor should register between 0.5V (fully 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.
- 11. Inspect the EGR position sensor wiring and connectors for damage or corrosion. Check for loose connections.
- 22. With the ignition on, use a multimeter to measure the voltage at the EGR position sensor. Expect between 0.5V to 4.5V depending on valve position. Are the readings below 0.1V?
- 3 - If yes, go to step 3. - If no, the sensor may be working properly. Check related EGR valve function.
Common causes
- Damaged wiring in the EGR sensor circuit
- Faulty EGR position sensor
- Faulty EGR valve
- Poor connections at the EGR sensor or wiring harness
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address this issue soon as it can affect emissions and engine performance.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code sometimes appear with other EGR system codes?
Multiple EGR codes may indicate a broader issue in the EGR system, like a faulty valve affecting sensor readings.
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