Exhaust Gas Temperature Sensor 1
Indicates a problem with exhaust gas temperature sensor 1.
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 gas temperature (EGT) sensor measures how hot the gases are after they leave the engine. If this sensor fails, you won't get an accurate reading, which can impact engine performance and emissions control systems.
What the computer is actually seeing
The engine control module (ECM) looks for EGT sensor input to optimize combustion. If it sees a reading outside expected values, it'll trigger this fault code.
What a healthy reading looks like
EGT sensor readings typically range from 300°F to 1200°F (150°C to 650°C) during normal operation, depending on load and engine conditions.
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.
- 1Check the wiring and connector to the EGT sensor for any signs of damage or corrosion.
- 2Using a multimeter, check the resistance of the EGT sensor. It should show varying resistance based on temperature; replace if out of spec.
- 3Inspect for exhaust leaks at the sensor location; leaks can cause incorrect readings.
Common causes
- Failed EGT sensor
- Wiring issues such as shorts or open circuits
- Corrosion or damage to sensor connections
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you should get it fixed soon, as incorrect exhaust temperatures can lead to performance issues or emissions failures.
Will this code come back after clearing?
If the issue isn't fixed, such as a bad sensor or damaged wiring, the code will likely return.
Why does this code pair with other SPN codes?
SPN codes often relate to the same system; in this case, EGT monitoring, so multiple related codes can trigger for similar reasons.
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