Exhaust Gas Temperature Sensor 1 (EGTS) Above Normal Operating Range
The exhaust gas temperature sensor 1 is reporting a temperature that exceeds the normal threshold.
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What it means (plain English)
The ECM (Engine Control Module) thinks the temperature of the exhaust gases is too high, which can indicate problems with the exhaust system, like a clogged DPF or a faulty sensor.
What the computer is actually seeing
The ECM monitors the temperature from the EGTS. If it reads a value above the typical range, it triggers a fault code. Normal numbers for exhaust gas temperature should be around 300-800°F after the turbo, depending on engine load and operating conditions.
What a healthy reading looks like
Normal exhaust gas temperature readings should be between 300°F and 800°F. If readings are consistently above 900°F, a fault will trigger.
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 for the exhaust gas temperature sensor for damage or corrosion. Repair as needed. Decision: Is wiring intact? Yes: Move to step 2. No: Repair wiring and retest.
Common causes
- Faulty exhaust gas temperature sensor
- Exhaust restriction (e.g., clogged DPF)
- Wiring issues or bad connections to the EGTS
- Incorrect ECM software or calibration
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you can drive but should fix it soon, as overheating can damage components.
Will this code come back after clearing?
If the issue is not resolved, yes, it will likely return after clearing.
Why is this code appearing alongside others?
It often pairs with other exhaust system codes due to overlapping functions and sensor logic.
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