EGR Temperature Sensor Circuit High
The EGR temperature sensor is reading a voltage that is too high.
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What it means (plain English)
The EGR temperature sensor measures how hot the exhaust gas is. If it's stuck high, the computer thinks the exhaust is way too hot, affecting how it controls emissions.
What the computer is actually seeing
The engine control module (ECM) sees a voltage signal from the EGR temperature sensor that exceeds its normal operating range, usually over 5 volts.
What a healthy reading looks like
EGR temperature sensor should output between 0.5V (cold, around 0°C) and 4.5V (hot, around 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. Check the wiring and connector to the EGR temperature sensor for damage or corrosion. If damaged, repair it.
- 22. With the ignition on, measure the voltage at the EGR temperature sensor connector. It should be around 0.5V to 4.5V. If it's above 5V, replace the sensor.
- 33. If the voltage is normal, check the ground circuit for the EGR sensor. A bad ground can cause false readings. Repair as needed.
- 44. If the wiring and sensor are good, consider testing the ECM. If possible, use a scan tool to monitor sensor data while the engine is running.
Common causes
- Faulty EGR temperature sensor
- Wiring issues in the sensor circuit
- Bad ECM
- Ground circuit issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive with this code. It can lead to higher emissions and potential damage to the EGR system.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code will come back.
Why does this code often appear with others?
EGR system issues often correlate with other faults like boost pressure or emissions controls, especially if wiring or sensor problems affect multiple components.
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