Exhaust Temperature Sensor 2 Circuit Low
Indicates the exhaust temperature sensor 2 is reading a low voltage signal.
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What it means (plain English)
The computer is seeing a voltage signal from exhaust temperature sensor 2 that is lower than expected, which might point to a problem with the sensor or its wiring.
What the computer is actually seeing
The Engine Control Module (ECM) expects to see a voltage between 0.5V to 4.5V from the exhaust temperature sensor 2 during normal operation.
What a healthy reading looks like
Voltage from the exhaust temperature sensor should be between 0.5V and 4.5V.
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 for damage or corrosion.
- 22. Check the exhaust temperature sensor 2 for physical damage.
- 33. Measure the voltage at the sensor connector with the engine running; it should be between 0.5V and 4.5V.
- 4 - If voltage is low or zero, suspect a wiring issue or a bad sensor.
- 5 - If voltage is within range, suspect an issue in the ECM or software.
Common causes
- Faulty exhaust temperature sensor 2
- Damaged wiring or connectors
- Corrosion at connector pins
- Open circuit in the sensor line
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
It's driveable, but you should fix it soon to avoid exhaust issues.
Will the code come back after clearing?
Yes, if the underlying issue isn't fixed.
Why do I see this code with other exhaust temperature sensor codes?
Multiple sensors are monitored, and issues can often appear together.
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