Engine-Exhaust Temperature Sensor 2
Fault with exhaust temperature sensor 2 in the system.
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What it means (plain English)
Exhaust temperature sensor 2 is malfunctioning or reporting incorrect readings, which can affect engine performance and emissions control.
What the computer is actually seeing
The engine control module (ECM) expects a voltage signal from the exhaust temperature sensor 2 between 0.5V (cold) and 4.5V (hot). If the reading is outside this range, it triggers the fault code.
What a healthy reading looks like
Normal operation should see voltages between 0.5V to 4.5V depending on exhaust temperature; values outside this range indicate a sensor issue.
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 connector at exhaust temperature sensor 2 for damage or corrosion. If found, repair or replace wiring/connectors. Decision: If repaired, clear the code and retest. If not, proceed to next step.
- 22. Measure the voltage coming from exhaust temperature sensor 2 with a multimeter while the engine runs. Expected voltage should be between 0.5V and 4.5V. Decision: If readings are in range, the sensor is likely good; check the ECM. If not, replace the sensor.
- 33. If sensor is replaced or found faulty, clear the code, run the engine and verify proper operation. Decision: If code returns, suspect ECM issues.
Common causes
- Wiring damage or corrosion at the sensor connection
- Faulty exhaust temperature sensor 2
- High exhaust temperatures due to turbocharger malfunctions
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but fix soon as it can affect exhaust emissions and may lead to further issues.
Will this code come back after clearing?
If the underlying issue isn't fixed (like a faulty sensor or wiring), it will return.
Why does this code appear with other related codes?
Faulty sensors often show multiple codes due to system interconnectivity; one issue can trigger several related faults.
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