Exhaust Gas Temperature Sensor 2, Circuit High
The exhaust gas temperature sensor 2 is reading a voltage that is too high.
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What it means (plain English)
The second exhaust gas temperature sensor is sensing a voltage over 4.9 volts, which means it's registering a higher than normal temperature. This is often caused by a short circuit or sensor failure.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage signal from exhaust gas temperature sensor 2. It expects a voltage between 0.5 and 4.5 volts at normal operating temperatures. A voltage above 4.9 volts triggers this fault code.
What a healthy reading looks like
Normal sensor output should range from 0.5V to 4.5V depending on the temperature; anything above 4.9V indicates a high reading.
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. Check the wiring and connectors for physical damage or corrosion. Repair if necessary.
- 22. Measure the voltage at the exhaust gas temperature sensor 2 connector; it should be between 0.5V and 4.5V. If it's above 4.9V, proceed to step 3.
- 33. Disconnect the sensor and measure resistance; it should be within the manufacturer specifications.
- 44. If the sensor shows high voltage with it disconnected, diagnose the wiring for shorts to power or ground. If no shorts are found, proceed to step 5.
- 55. Replace the exhaust gas temperature sensor if all wiring checks out.
Common causes
- Short circuit in the wiring harness
- Failed exhaust gas temperature sensor
- ECM software issue
- Grounding issues in the circuit
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to avoid driving until resolved to prevent potential engine or exhaust system damage.
Will this problem come back after being fixed?
If the underlying issue is resolved, it should not return; however, a faulty wiring harness could cause recurrence.
Why does this code appear with SPN 5292?
SPN 5292 relates to the first sensor; issues with exhaust temperature sensors often occur together due to wiring problems.
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