Low Exhaust Gas Temperature (EGT) Sensor 2
The EGT sensor 2 reading is lower than expected during operation.
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What it means (plain English)
The computer uses EGT sensors to check how hot the exhaust gases are, helping to control emissions. If the sensor reports a temp that's too low (below 100°C / 212°F when it should be higher), it triggers this code, thinking there's a problem with heating or an issue in the exhaust system.
What the computer is actually seeing
The engine control module (ECM) sees an EGT sensor 2 value that is significantly lower than the typical operating range. It monitors values typically above 200°C (392°F) for proper exhaust chain reaction processes in temperature range.
What a healthy reading looks like
EGT sensor 2 should show values between 250°C and 800°C (482°F to 1472°F) during normal operation; values below 100°C when the engine is at operating temperature indicate a problem.
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 EGT sensor 2. Look for broken wires, corrosion, or loose connections. If there are issues, repair them. Decision: If fixed, clear codes and retest.
- 22. Measure the resistance of EGT sensor 2; a properly functioning sensor should be around 2 to 5 ohms at room temperature. If it's out of spec, replace the sensor. Decision: If replaced, clear codes and retest.
- 33. Inspect for exhaust leaks in the pipes before sensor 2. Any leaks can cause erroneous readings. Fix any leaks found. Decision: If fixed, clear codes and retest.
- 44. If the code persists, check for updates from the manufacturer for possible ECM calibration updates. Follow the service manual to ensure proper calibration.
Common causes
- Faulty EGT sensor 2
- Wiring issues or bad connectors to EGT sensor 2
- Exhaust leaks before the sensor location
- Calibration issue in ECM software
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but you may notice increased emissions and potential for increased fuel consumption.
Will this code come back after repair?
If the underlying issue is properly fixed, the code shouldn't return. However, if the repairs were incomplete or the sensor was faulty, it might.
Why does this code pair with EGT sensor readings?
This code specifically measures the performance of EGT sensor 2, so related performance issues will often show up nearby.
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