Engine Exhaust Temperature Sensor 2 - High
This code indicates a problem with the second engine exhaust temperature sensor reading too high.
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 temperature sensor 2 is telling the engine computer that the exhaust gas temperature is higher than it should be, likely over 1800°F for continuous periods, which can cause the system to go into a protective mode.
What the computer is actually seeing
The engine control module (ECM) expects the exhaust temperature to be between 600°F and 1300°F during normal operation, and if it reads above this, it will trigger the fault code.
What a healthy reading looks like
Normal operation expected between 600°F and 1300°F, with maximum limits around 1800°F.
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 of exhaust temperature sensor 2 for damage or corrosion. Decision Point: Are connections secure and undamaged? Yes: Go to step 2; No: Repair or replace wiring/connectors and retest.
- 22. Measure the exhaust temperature with a handheld gauge at the sensor location. Compare this measurement to the ECM reading. Decision Point: Is the measured temperature consistent with ECM reading? Yes: Consider sensor replacement; No: Investigate exhaust system for leaks or overheating.
Common causes
- Faulty exhaust temperature sensor 2
- Wiring issues or shorts to power/ground
- Exhaust leaks affecting sensor readings
- Failure in the exhaust system causing overheating
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Not recommended, especially if the exhaust temperature is excessively high which could damage the exhaust system.
Will this code come back after repairs?
If the repairs address the root cause, it should not return, but ensure all wiring and connections are checked.
Why does this code sometimes pair with other codes?
Multiple fault codes may indicate a broader issue with the exhaust system or related sensors.
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