Exhaust Gas Temperature Sensor 2 Circuit Low
Indicates a low voltage from the exhaust gas temperature sensor 2.
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What it means (plain English)
The exhaust gas temperature sensor 2 is sending a voltage signal that is lower than expected, usually indicating a problem like a short circuit or sensor failure.
What the computer is actually seeing
The engine control unit (ECU) expects the exhaust gas temperature sensor 2 to send a voltage between 0.5V and 4.5V in normal conditions. A voltage below 0.5V is interpreted as a fault.
What a healthy reading looks like
Normal sensor voltage should be between 0.5V to 4.5V, with a typical range around 1V to 2.5V under normal operating conditions after engine warm-up.
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 exhaust gas temperature sensor 2 wiring for damage or corrosion.
- 2Inspect the connector for secure fit and any signs of wear or moisture.
- 3Measure the voltage at the sensor connector keying it at the ECU side - it should be around 1V to 2.5V when the engine is running.
- 4If the voltage is below 0.5V, check for a short to ground in the wiring harness.
- 5If voltage is normal, replace the exhaust gas temperature sensor 2.
Common causes
- Faulty exhaust gas temperature sensor 2
- Wiring issues such as shorts or opens in the sensor circuit
- Bad connections at the sensor or ECU
- Corrosion or damage in the connectors
- Electrical interference from nearby components
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's safe to drive, but you should fix this issue soon to avoid potential overheating or other emissions problems.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return after a short period or specific operating conditions.
Why does this code affect the engine's performance?
The exhaust temperature is critical for ensuring proper emissions control, and incorrect readings can affect fuel management and increase emissions.
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