Exhaust Gas Temperature Sensor 2 Circuit Range/Performance Problem
This code indicates a problem with the exhaust gas temperature sensor circuit for the second 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)
Your vehicle has two sensors measuring the temperature of exhaust gases. When the second one isn't reading properly, the computer throws this code. It's like a temperature gauge showing the wrong number.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage signal from the exhaust gas temperature sensor. It expects a certain voltage range (typically around 0.5 to 4.5 volts). If the signal is out of this range or doesn't correlate with expected exhaust temperatures, the P241B code sets.
What a healthy reading looks like
Expected sensor voltage should be within 0.5V to 4.5V, correlating with exhaust temperature of 300°F to 1300°F (150°C to 700°C).
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 condition of the wiring and connectors for the exhaust gas temperature sensor 2. Look for any damage or corrosion.
- 22. Measure the voltage at the sensor connector with the engine running. It should be between 0.5V and 4.5V.
- 33. If the voltage is out of range, replace the exhaust gas temperature sensor 2 and retest.
- 44. If the voltage is normal, check the exhaust system for leaks or blockages, which can cause incorrect readings.
- 55. Clear the code and see if it returns after a test drive.
Common causes
- Faulty exhaust gas temperature sensor 2
- Wiring issues (short, open circuit, corrosion)
- Bad ECM
- Poor connections at the connector
- Exhaust leaks affecting temperature readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's moderately safe to drive but fix it soon as it can affect emissions and performance.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it will likely return.
Why does this code pair with P241A?
P241A indicates a problem with the first exhaust gas temperature sensor. Both sensors are related in monitoring exhaust temperature.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →