Exhaust Gas Temperature Sensor 2 - Circuit Low
Indicates a low voltage reading from Exhaust Gas Temperature (EGT) Sensor 2.
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What it means (plain English)
EGT Sensor 2 monitors how hot the exhaust gases are. If it reads too low, the computer thinks the sensor might be bad or there’s an issue with the wiring.
What the computer is actually seeing
The engine control unit (ECU) expects a voltage between 0.5V to 2.5V from EGT Sensor 2, depending on exhaust temperature. A reading below 0.5V prompts this code.
What a healthy reading looks like
Expected voltage from EGT Sensor 2: 0.5V to 2.5V.
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 connector for EGT Sensor 2; look for signs of damage, corrosion, or disconnection.
- 22. Test the EGT Sensor 2 with a multimeter; check if voltage is within 0.5V to 2.5V at normal operating temperature.
- 33. If the voltage is low, replace EGT Sensor 2 and retest the system. If voltage is still low after the sensor replacement, check for open circuits or shorts in the wiring.
- 44. If all wiring is good and sensor is functional, check the ECU for software updates or faults.
Common causes
- Faulty EGT Sensor 2
- Wiring issues or open circuit
- Short to ground in the sensor circuit
- Connector corrosion or damage
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but monitor performance as it may affect emissions and fuel efficiency.
Will this fault code come back after repair?
If all issues are correctly resolved, it should not return. Clear the code and monitor the system.
Why does this code sometimes pair with SPN 2312?
SPN 2312 deals with Sensor 1, so issues with the EGT system can often impact multiple sensors.
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