Exhaust Gas Temperature Sensor 2 Circuit High
The second exhaust gas temperature sensor circuit voltage is higher than expected.
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What it means (plain English)
The exhaust gas temperature sensor 2 measures the heat of the exhaust gases but is reading a voltage that's too high, indicating a possible issue with the sensor or its wiring.
What the computer is actually seeing
The Engine Control Module (ECM) expects a voltage from the sensor between 0.5V and 2.5V based on exhaust temperature. A reading above 2.5V is considered too high and triggers the fault code.
What a healthy reading looks like
Normal operation should show sensor readings between 0.5V and 2.5V during standard driving conditions.
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 the exhaust gas temperature sensor 2. Ensure there are no frays, cuts, or corrosion.
- 22. Check the voltage at the sensor connector with a multimeter. You should find it between 0.5V and 2.5V when the engine is at operating temperature.
- 33. If the voltage is higher than 2.5V, disconnect the sensor and check the voltage again. If the voltage drops, replace the sensor.
- 44. If the voltage is still high with the sensor disconnected, inspect the wiring between the sensor and the ECM for shorts or bad grounds.
- 55. If the wiring is intact and the sensor is functioning, consider testing or replacing the ECM.
Common causes
- Shorted wiring in the sensor circuit
- Faulty exhaust gas temperature sensor 2
- Corrosion at connectors
- Faulty ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address it soon; while it may be drivable, heightened exhaust temperature can lead to further damage to the system.
Will this code come back after clearing?
Yes, if the underlying issue isn't fixed, the code will likely reappear.
Why is this paired with other codes?
Interconnected components can fail together, especially in the exhaust system, which can cause multiple codes related to emissions.
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