Faulty EGR Temperature Sensor
The engine's EGR temperature sensor is reporting an out-of-range reading.
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What it means (plain English)
The Exhaust Gas Recirculation (EGR) system helps control emissions by recirculating some exhaust gases back into the engine. The temperature sensor detects how hot those gases are, and when it sees a temperature that doesn't match what it should, it triggers this fault code.
What the computer is actually seeing
The Engine Control Unit (ECU) is monitoring the EGR temperature sensor and expects a voltage signal between 0.5V (cold) to 4.5V (hot). If the voltage is below 0.5V or above 4.5V, it triggers a fault code.
What a healthy reading looks like
EGR temperature should range from 0.5V (approximately 0°C) to 4.5V (approximately 600°C).
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 for damage or corrosion. Repair as needed. Decision point: Are wires intact? If no, repair first. If yes, move to step 2.
- 22. Use a multimeter to test the EGR temperature sensor output voltage. Expected: 0.5V - 4.5V under normal operating conditions. Decision point: Is the voltage within range? If yes, the sensor may still be defective. If no, replace sensor.
- 33. Check EGR valve operation. Ensure it opens and closes properly without sticking. Test valve functionality. Decision point: Is the EGR valve operating correctly? If no, replace valve. If yes, clear codes and retest.
Common causes
- Faulty EGR temperature sensor
- Wiring issues or short circuit in the EGR sensor circuit
- Poor connector contact or corrosion
- Failed EGR valve causing excessive heat in the system
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may experience reduced engine performance and increased emissions.
Will this code come back after clearing?
If the problem isn't resolved, yes, it will likely return.
Why does this code pair with others?
It's common for EGR-related issues to affect multiple sensors or components, leading to multiple codes.
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