Engine Exhaust Temperature Sensor 2
Indicates high temperature readings from the second engine exhaust temperature sensor.
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What it means (plain English)
The second exhaust temperature sensor is showing a temperature reading that's too high, which can affect engine performance and emissions control systems.
What the computer is actually seeing
The engine control module (ECM) reads temperature data from the exhaust temperature sensor 2. If the sensor reports a temperature exceeding its set threshold, this code triggers.
What a healthy reading looks like
Normal exhaust temperature readings should typically be between 300°F to 800°F when the engine is at operating temperature, depending on load and RPM.
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. Verify the fault code with a scan tool before proceeding.
- 22. Inspect wiring and connectors for exhaust temperature sensor 2. Look for frayed wires or corrosion. Repair as necessary. If wiring is intact, proceed to step 3.
- 33. Check exhaust temperature sensor 2 using a multimeter. Measure resistance across the sensor terminals at ambient temperature. Expected resistance should be within 2,000 to 4,000 ohms. If readings are outside this range, replace the sensor. If readings are fine, continue to step 4.
- 44. Start the engine and observe live data from the exhaust temperature sensor 2. If the temperature reading is consistently above 800°F, check for exhaust leaks near the sensor. Repair leaks as necessary and recheck.
- 55. If there are no leaks and the sensor still reads high, replace exhaust temperature sensor 2 and clear codes.
Common causes
- Faulty exhaust temperature sensor 2
- Wiring issues or poor connections to the sensor
- Exhaust leaks near the sensor
- Overheating due to engine load or conditions
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
Moderate severity means it can impact drivability and emissions; fix soon but you may be able to drive short distances.
Will this code come back after a repair?
If the sensor or wiring was faulty and has been repaired or replaced correctly, it should not return. Monitor for any signs of overheating.
Why does this code show up with other exhaust temperature codes?
It’s common for multiple temperature sensors to trigger codes if there are systemic issues, like electrical faults or exhaust leaks.
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