Exhaust Gas Temperature Sensor 2 Fault
There's a problem with the second exhaust gas temperature sensor reading.
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 sensor measures how hot the exhaust gases are after they exit the engine. It helps the engine computer manage emissions. If the sensor gives a reading that is out of range, it can trigger this fault code.
What the computer is actually seeing
The engine control unit (ECU) looks for the output voltage from the exhaust gas temperature sensor, which should typically range from 0.5V (low temp) to around 1.5V (high temp) under normal operating conditions. If it sees a voltage outside of this range, it will log SPN 3319.
What a healthy reading looks like
Normal range of the exhaust gas temperature sensor should be between 0.5V and 1.5V. If the voltage is below 0.2V or above 2.0V, it may trigger this fault.
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 vehicle's service manual for specific sensor locations and wiring diagrams.
- 2Inspect the wiring and connectors to the exhaust gas temperature sensor 2 for damage or corrosion.
- 3Use a multimeter to measure the voltage output at the sensor with the key on and engine off; expect around 0.5V to 1.5V. If the reading is below 0.2V or above 2.0V, replace the sensor.
- 4If the sensor is within proper range, check for exhaust leaks upstream of the sensor that might affect its reading.
- 5If all checks are okay and fault persists, consider reprogramming or replacing the ECU.
Common causes
- Faulty exhaust gas temperature sensor 2
- Wiring harness issues (cut, chafed, or corroded)
- Connector problems (loose or corroded terminals)
- Exhaust leaks affecting sensor readings
- ECU software issues
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 experience reduced engine performance or fuel efficiency.
Will this code come back after clearing?
If the underlying issue isn't resolved, such as a faulty sensor or wiring, the code will likely return.
Why does this code pair with other sensor codes?
Multiple sensor faults may indicate a common issue, such as wiring problems or a malfunctioning ECU affecting several sensors.
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