Exhaust Gas Temperature Sensor 2
This code indicates a problem with the second exhaust gas temperature sensor.
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 second exhaust gas temperature sensor measures how hot the exhaust gases are after they leave the engine. If it's reading way too high or too low, the computer thinks there's a problem, like a faulty sensor or a potential exhaust leak.
What the computer is actually seeing
The engine control unit (ECU) monitors the voltage from the exhaust gas temperature (EGT) sensor, looking for values typically ranging between 0.5V to 4.5V based on temperature. If the voltage is outside the normal range, it triggers the fault code.
What a healthy reading looks like
Normal EGT sensor voltage values should be between 0.5V (around 300°F) and 4.5V (around 1500°F). Readings significantly outside this range indicate an 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. Inspect the wiring and connectors to the EGT sensor for any signs of damage or corrosion. If found, repair or replace the wiring/connector. Decision point: Does the code clear? If yes, you're done.
- 22. Measure the voltage at the EGT sensor connector with the engine running. Expect readings between 0.5V and 4.5V. Decision point: Are the readings normal? If no, replace the EGT sensor and retest.
- 33. If the voltage is normal, check for exhaust leaks near sensor 2. Decision point: Are there leaks present? If yes, repair the leaks and retest.
- 44. If everything checks out but the code persists, check the ECU for faults. If there are programming issues, consider an ECU reset or reprogramming.
Common causes
- Faulty exhaust gas temperature sensor 2
- Wiring issues or damaged connectors
- Exhaust leaks affecting sensor readings
- ECU programming issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may experience reduced performance or increased emissions, so fix it soon.
Will this code come back after clearing?
It may come back if the underlying issue isn't fixed.
Why is this code paired with other SPN codes?
Multiple exhaust gas sensors can affect each other's readings, triggering related codes.
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