High Exhaust Gas Temperature (EGT)
The engine's exhaust gas temperature is higher than normal.
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What it means (plain English)
The exhaust gas temperature sensor is measuring temperatures above normal operating limits, which can damage the exhaust system or engine components if not addressed.
What the computer is actually seeing
The ECM monitors EGT readings and expects values between 300°F and 1,200°F during normal operation. Values above this threshold trigger the fault code.
What a healthy reading looks like
Normal operating EGT values should be in the range of 300°F to 1,200°F. If a single reading exceeds 1,300°F, the code is triggered.
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. Inspect the wiring and connectors to the EGT sensor for damage or corrosion. If damaged, repair or replace. Decision: If wiring is good, proceed to the next step. If damaged, fix and retest the system.
- 22. Check the engine coolant and oil levels to ensure they are within normal operating ranges. If low, top off and retest.
- 33. Start the engine and monitor the EGT reading using a scan tool. If reading exceeds 1,300°F, further investigate. If normal, consider resetting the code and see if it returns.
- 44. Check for exhaust leaks or restrictions in the exhaust system. Repair any issues found. Test drive the vehicle and observe EGT readings under load conditions.
- 55. If EGT readings remain high, consider testing or replacing the EGT sensor. Check for fuel system issues and turbocharger performance.
Common causes
- Faulty EGT sensor
- Exhaust restriction
- Fuel system issues (excess fuel or poor combustion)
- Turbocharger malfunction
- Excessive engine load or power demand
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but it's not recommended. High EGT can lead to engine or exhaust component damage.
Will this code clear itself?
It may clear if the issue is temporary, but if the underlying problem is not fixed, it will likely return.
What happens if I ignore this code?
Ignoring it can lead to severe engine damage and costly repairs.
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