Exhaust Gas Temperature Sensor 2 Out of Range
ECM detects exhaust gas temperature sensor 2 is reading outside its normal range.
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What it means (plain English)
The exhaust gas temperature sensor 2 measures how hot the exhaust gases are after they leave the engine. If the reading is too high or too low, the engine control unit (ECU) thinks something's wrong, which could affect how the engine runs.
What the computer is actually seeing
The engine control module (ECM) is monitoring the voltage signal from exhaust gas temperature sensor 2. It expects the signal to be within a certain range (usually between 0.5V to 4.5V for typical sensors). If it sees a voltage below around 0.5V or above 4.5V, it triggers this fault code.
What a healthy reading looks like
Normal voltage from the exhaust gas temperature sensor 2 should be between 0.5V to 4.5V at operating conditions; expect around 2.5V at idle.
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 wiring and connectors for the exhaust gas temperature sensor 2. Look for frays, corrosion, or loose connections. If found, repair and retest.
- 22. Using a scan tool, check the live data for exhaust gas temperature sensor 2. Note the voltage reading. If it's out of range (below 0.5V or above 4.5V), proceed to step 3.
- 33. Disconnect the exhaust gas temperature sensor 2 and measure the resistance across the sensor terminals. Compare with manufacturer specifications. If resistance is outside the specified range, replace the sensor.
- 44. If the sensor reads normal, inspect the ECM for faults. Check for updates or replacements if necessary.
Common causes
- Faulty exhaust gas temperature sensor 2
- Wiring issues (shorts or opens) in the sensor circuit
- Faulty ECM
- Exhaust leaks affecting sensor readings
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but be aware that performance may be affected and it could lead to other issues if not fixed soon.
Will this code come back after I fix it?
If the root cause is resolved, the code should not reappear.
Why does this code sometimes pair with other codes?
Multiple sensor failures can occur in related systems, especially if wiring or ECM issues are present.
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