Engine Exhaust Temperature Sensor Out of Range
The ECU detected that the exhaust temperature is outside the expected range.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The exhaust temperature sensor is measuring a heat level that's too high or too low compared to what the engine should be running at, which can indicate a problem with the engine or the sensor itself.
What the computer is actually seeing
The computer monitors the exhaust temperature sensor input, expecting a signal that should range from 0.5V to 4.5V under normal operating conditions. If the voltage is consistently below 0.5V or above 4.5V, the code will trigger.
What a healthy reading looks like
Normal exhaust temperature should be between 300°F and 1600°F (149°C to 871°C), with a corresponding sensor voltage between 0.5V and 4.5V.
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 connector to the exhaust temperature sensor for any damage or corrosion. If the wiring or connector is faulty, repair or replace as needed. Decision: If no visible issues, proceed to step 2.
- 22. Measure the output voltage from the exhaust temperature sensor with a multimeter. Voltage should be between 0.5V and 4.5V when engine is at operating temperature. Decision: If voltage is out of range, replace the sensor. If within range, proceed to step 3.
- 33. Check for exhaust leaks in the system, especially around the sensor. Any leaks can affect the temperature readings. Decision: If leaks are found, repair them and retest. If no leaks are found, proceed to step 4.
- 44. Review any related engine performance codes that may correlate with this fault. Address any additional codes as necessary. Decision: If related codes are present, resolving them may also resolve this fault code.
Common causes
- Faulty exhaust temperature sensor
- Broken wiring or poor connections
- Exhaust leaks
- Engine performance issues (such as misfire or poor combustion)
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Can I still drive my vehicle with this code?
It's drivable, but keep an eye on performance. Address it soon to avoid potential engine problems.
Will this problem come back after I fix it?
If the underlying issue is resolved and the sensor is functioning correctly, it shouldn't return.
Why does this code show up alongside other codes?
It's common for multiple issues to affect the same systems, so faults can trigger related codes.
Working a real vehicle right now?
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