Exhaust Temperature Sensor 1 Out of Range
The exhaust temperature sensor is reading a value that is outside of expected limits.
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 measures how hot the exhaust gases are. If it's showing too high or too low a temperature compared to what the computer expects, something’s off—could be a faulty sensor or an issue in the exhaust system.
What the computer is actually seeing
The engine control unit (ECU) typically expects the exhaust temperature to be within a range of 300°F to 1200°F (149°C to 649°C). If it reads below 200°F (93°C) or above 1300°F (704°C), it triggers this code.
What a healthy reading looks like
Normal exhaust temperatures range from 300°F to 1200°F (149°C to 649°C); values outside 200°F (93°C) to 1300°F (704°C) will trigger the fault.
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 the exhaust temperature sensor for any damage or corrosion. Repair as necessary. Decision Point: Are the wiring and connectors in good condition? Yes: Go to step 2; No: Repair these issues.
Common causes
- Faulty exhaust temperature sensor
- Wiring issues or bad connectors
- Exhaust leaks affecting temperature readings
- ECU software glitch
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately severe; you can drive but should fix it soon to avoid emissions issues.
Will this code come back after repair?
If all repairs are done correctly and there's no further issue in the exhaust system, it shouldn't come back.
Why does this code pair with SPN 5116?
SPN 5116 usually indicates a related issue with the second exhaust temperature sensor, often indicating a systemic problem.
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