Exhaust Gas Temperature Sensor 2 Circuit High
The exhaust gas temperature sensor 2 is reporting a high voltage.
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What it means (plain English)
The exhaust gas temperature sensor 2 is telling the computer that the exhaust temperature is too high. This can happen if there's a problem with the sensor, the wiring, or the exhaust system.
What the computer is actually seeing
The ECM expects the signal from exhaust gas temperature sensor 2 to be within a certain range (typically 0.5 to 4.5 volts) under normal operating conditions, indicating the exhaust temperature.
What a healthy reading looks like
Expected values for exhaust gas temperature should range between 200°F to 1500°F depending on engine load and operating conditions. A reading above 4.5 volts is typically flagged as high.
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 wiring and connectors of the exhaust gas temperature sensor 2 for damage, corrosion, or loose connections. Fix any issues found and retest.
- 22. Check the exhaust gas temperature sensor 2's resistance with a multimeter. Expected resistance varies by vehicle, but typically around 10-100 ohms when cold. If outside this range, replace the sensor.
- 33. With the vehicle running, monitor the voltage at the sensor connector. Ensure the voltage is fluctuating within the 0.5 to 4.5 volts range. If voltage is constantly high (over 4.5V), the sensor may be shorted or defective.
Common causes
- Shorted sensor
- Damaged wiring or connector
- Faulty exhaust gas temperature sensor
- High exhaust gas temperature due to engine issues or poor fuel quality
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but you should address it soon to prevent potential engine damage or decreased performance.
Will this code come back after clearing it?
It depends on whether the underlying issue is fixed. If the sensor or wiring is faulty, it will likely return.
Why does this code sometimes pair with other SPN codes?
This can indicate multiple issues in the exhaust system, such as failing sensors or problems with the exhaust after-treatment system.
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