Engine Exhaust Temperature Sensor 2
Issues with the second engine exhaust temperature sensor.
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What it means (plain English)
The second exhaust temperature sensor, which monitors the exhaust pipe temperature, is reporting a problem.
What the computer is actually seeing
The engine control unit is getting either too high or too low a voltage reading from the exhaust temperature sensor 2, indicating a fault in the sensor or its circuit.
What a healthy reading looks like
The voltage for a functioning sensor should be between 0.5 and 2.5 volts, varying with temperature and engine conditions.
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 exhaust temperature sensor 2 for damage or corrosion. If found, repair or replace as needed. Decision point: Is the wiring intact? If yes, move to step 2. If no, fix wiring first.
- 22. Measure the voltage output of exhaust temperature sensor 2 with the engine running. Expect between 0.5 and 2.5 volts. Decision point: Is the voltage within range? If yes, move to step 3. If no, replace the sensor.
- 33. Verify the signal to the ECM by checking continuity from the sensor to the ECM connector. If continuity is good, check for ECM software updates or reprogramming. Decision point: Is there continuity? If yes, consider ECM issues. If no, repair the circuit.
Common causes
- Faulty exhaust temperature sensor 2
- Damaged wiring or connectors
- Corrosion at the sensor connector
- Failed ECM software or programming issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity. You can drive, but fix it soon to avoid potential emissions issues.
Will this code come back after clearing?
If there's an underlying problem like a damaged sensor or wiring, it will likely return.
Why does this code sometimes pair with SPN 1324?
SPN 1324 is for the first exhaust temperature sensor, so problems can occur in both sensors if there's a common wiring issue.
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