Engine Exhaust Temperature Sensor 2
Exhaust temperature sensor 2 is showing an abnormal reading.
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What it means (plain English)
The truck has a sensor that measures the heat in the exhaust system. If it thinks the temperature is too high or too low, it throws this code to alert you that something might be wrong with the exhaust system or the sensor itself.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage signal coming from exhaust temperature sensor 2. If it sees a value outside the expected range, it triggers the fault code.
What a healthy reading looks like
The normal voltage range from the sensor should be between 0.5V to 1.5V when the exhaust temperature is within spec; anything outside this range could cause a fault.
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 connector to exhaust temperature sensor 2 for damage or corrosion. If damaged, repair or replace.
- 22. Measure the voltage at the sensor with the key on and engine off. Should be around 0.5V to 1.5V. If outside this range, replace the sensor.
- 33. Check for exhaust leaks near the sensor. If found, repair the leaks and recheck the code.
- 44. If the wiring and sensor are okay and no exhaust leaks are present, consider updating ECM software before replacing the ECM.
Common causes
- Faulty exhaust temperature sensor 2
- Wiring or connector issues to the sensor
- Exhaust leaks affecting temperature readings
- ECM software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive it, but check it soon as it could affect emissions and performance.
Will this code come back after clearing it?
If the problem isn't fixed, yes, the code will reappear.
Why does this code pair with others like SPN 1196?
They often relate to the same components or systems, indicating a broader issue in the exhaust temperature sensing circuit.
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