Exhaust Gas Temperature Sensor 2 Circuit High
Indicates a high reading from the secondary exhaust gas temperature sensor.
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What it means (plain English)
The second exhaust gas temperature sensor is showing higher temperatures than it should, which can affect engine performance and emissions.
What the computer is actually seeing
The ECM is receiving voltage readings from the exhaust gas temperature sensor 2 that exceed the normal operational range, typically above 2.5 volts in this case.
What a healthy reading looks like
Normal operation is usually between 0.5 volts to 1.5 volts. Anything above 2.5 volts is flagged as high.
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 wiring and connectors for damage or corrosion. If found, repair as needed. Decision: Go to step 2 if wiring is good, replace wiring if damaged.
- 22. Measure the voltage at the exhaust gas temperature sensor 2 connector. Expected is between 0.5 and 1.5 volts. Decision: If voltage is high, replace the sensor. If normal, go to step 3.
- 33. Check for exhaust leaks near the sensor location. Repair any leaks found. Decision: If exhaust leaks were present and repaired, clear the code and test drive. If code returns, proceed to step 4.
- 44. Inspect the vehicle's ECM for fault. If other codes are present or if the ECM shows signs of failure, consider replacing the ECM.
Common causes
- Wiring issues (shorts to power)
- Faulty exhaust gas temperature sensor 2
- Poor connections or corroded terminals
- Exhaust leaks affecting temperature sensor readings
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's driveable, but the engine may run inefficiently and may affect emissions compliance. Fix soon.
Will this code come back after clearing?
If the fault persists, the code will return after a short time or after a few drive cycles.
Why does this code pair with other codes?
Multiple codes may relate to the same sensor issues or overall engine temperature problems that can affect multiple systems.
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