Exhaust Gas Temperature Sensor 2 - High
The exhaust gas temperature sensor 2 is reading too high a temperature.
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What it means (plain English)
The exhaust gas temperature sensor 2 measures how hot the exhaust gases are coming from the engine, and when this sensor shows a temperature higher than it should, it means something is wrong, either with the sensor itself or the exhaust system.
What the computer is actually seeing
The engine control module (ECM) monitors the output voltage from exhaust gas temperature sensor 2. A high voltage reading indicates high temperature, typically above 1.5 volts which corresponds to temperatures above 1,150°F (621°C).
What a healthy reading looks like
The expected voltage signal from the exhaust gas temperature sensor 2 should be between 0.5 volts (200°F or 93°C) and 1.5 volts (1,150°F or 621°C).
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.
- 1Check the exhaust system for leaks or damage. Repair as necessary.
- 2Inspect the wiring and connectors going to exhaust gas temperature sensor 2 for corroded or damaged connections.
- 3Test the exhaust gas temperature sensor 2 with a multimeter; it should output between 0.5 volts and 1.5 volts at normal operating temperature. Replace the sensor if readings are outside this range.
- 4Perform a scan tool check for other related fault codes that might indicate additional issues.
Common causes
- Faulty exhaust gas temperature sensor 2
- Short circuit in the wiring to the sensor
- Exhaust leaks
- Faulty ECM calibration
Typical repair cost
$$
Related codes
Frequently asked questions
Can I keep driving with this code?
It's not recommended to drive for long with this code as it may lead to further engine damage or affect emissions.
Will this code come back after I fix it?
If the root cause is fixed, the code shouldn't come back, but if there's an underlying issue, it may reappear.
Why does this code relate to temperature when I have no visible exhaust issues?
Internal sensor failure or wiring issues can cause incorrect readings, even if the exhaust system appears fine.
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