Exhaust Gas Temperature Sensor 2 Circuit High
The exhaust gas temperature sensor 2 circuit reading is too high.
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What it means (plain English)
The computer is seeing a temperature reported by the second exhaust gas temperature sensor that’s higher than expected, indicating a possible sensor fault or wiring issue.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage from the second exhaust gas temperature sensor. If the voltage is consistently above 4.9 volts (the upper limit for most sensors), it triggers this fault code.
What a healthy reading looks like
Typical operating voltage for an exhaust gas temperature sensor ranges from 0.5 to 4.5 volts. A reading above 4.9 volts indicates a problem.
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.
- 1Inspect wiring and connectors for signs of wear or damage.
- 2Check the exhaust gas temperature sensor 2 for physical damage or corrosion.
- 3Using a multimeter, test the voltage at the sensor connector. It should be between 0.5 and 4.5 volts with the engine running.
- 4If the readings exceed 4.9 volts, replace the sensor and retest. If readings are normal, inspect the ECM and wiring harness for faults.
Common causes
- Faulty exhaust gas temperature sensor
- Short circuit in the wiring to the sensor
- Open circuit in the sensor ground
- Exhaust leaks affecting sensor readings
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's not recommended to drive for long if you're experiencing performance issues or overheating issues related to the exhaust system.
Will this code come back after repairs?
If the repair was done properly and there are no underlying issues, the code should not return.
Why does this code sometimes pair with other sensor codes?
Multiple sensor failures can indicate wider electrical issues or problems within the exhaust system.
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