Exhaust Gas Temperature Sensor 2 Circuit Range/Performance Problem
The exhaust gas temperature sensor 2 is reporting an out-of-range voltage or resistance.
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)
Your truck has a sensor that measures how hot the exhaust gases are, and it's saying the temperature is too high or too low for what it should be.
What the computer is actually seeing
The vehicle computer interprets the voltage signal from the sensor and expects a specific range that indicates normal temperature. If the voltage is too high (over 4.9V) or too low (under 0.2V), it triggers the code.
What a healthy reading looks like
The exhaust gas temperature should typically be between 100°C and 900°C (212°F to 1652°F) depending on engine load and conditions. Sensor voltage should be between 0.2V and 4.9V for normal operation.
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 connectors for the exhaust gas temperature sensor 2 for any damage or corrosion. Repair if necessary.
- 22. Using a multimeter, measure the voltage at the sensor's connector with the engine running. It should be between 0.2V and 4.9V. If it's out of this range, proceed to the next step.
- 33. Disconnect the sensor and check its resistance. It should be within the manufacturer’s specified range (check service manual). If it’s out of specs, replace the sensor.
- 44. If the sensor is good, check for an exhaust leak around the sensor that could be influencing its readings.
- 55. If all checks pass and the problem persists, consider checking the engine control module (ECM) for software updates or internal faults.
Common causes
- Faulty exhaust gas temperature sensor 2
- Open or shorted wiring for the sensor
- Poor connection at the sensor or ECM
- Exhaust leaks affecting sensor operation
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
While you may still drive, consider fixing it soon to avoid performance issues and potential engine damage.
Will this code come back after clearing?
If the underlying issue is not fixed, the code will likely return.
Why does this code sometimes pair with P2038?
P2038 indicates a similar issue with a different exhaust gas temperature sensor, so if one is faulty, the other may be as well.
Working a real vehicle right now?
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