Exhaust Gas Temperature Sensor 2 Circuit High
The exhaust gas temperature sensor 2 has detected a higher than normal temperature condition.
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What it means (plain English)
The sensor that measures exhaust gas temperature is sending a signal that it's detecting temperatures above what it's designed to handle, which can happen if there's a wiring issue, a faulty sensor, or actual over-temperature conditions.
What the computer is actually seeing
The engine control module (ECM) sees a voltage from the exhaust gas temperature sensor 2 that exceeds its programmed parameters, typically above 4.5 volts or a signal indicating an anomaly in temperature readings.
What a healthy reading looks like
Normal operation should see EGT sensor outputs around 0.5 to 4.5 volts, correlating to exhaust temperatures from 300°F to 1500°F depending on engine operation.
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. Look for frayed wires, corrosion, or loose connections. Did you find any issues? (Yes: repair or replace wiring/connectors; No: continue)
- 22. Check the exhaust gas temperature sensor 2 with a multimeter. At operating temperature, is the voltage within the expected range of 0.5 to 4.5 volts? (Yes: sensor is likely good; No: replace the sensor)
- 33. If the sensor is reading high, run a quick visual check on the exhaust system for signs of blockage or excessive heat. Are there any visible issues? (Yes: address exhaust issues; No: consider further engine diagnostics)
Common causes
- Faulty exhaust gas temperature sensor 2
- Wiring issues including shorts or opens in the circuit
- Corroded or loose connectors
- Overheating due to lean fuel mixture or engine problems
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I keep driving with this code?
It's not recommended to drive long distances with this code, as it indicates potential overheating risks which can damage the engine.
Will this code come back after I clear it?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code sometimes pair with SPN 5323?
SPN 5323 is related to the same sensor circuit; when one shows a fault, the other often does due to shared wiring or component failures.
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