Engine Exhaust Temperature Sensor 2 - Circuit Range/Performance Problem
Sensor 2 monitoring engine exhaust temperature is out of range.
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 measures how hot the exhaust gases are. If it reads too high or low, it signals there's a problem with the exhaust system or the sensor itself.
What the computer is actually seeing
The ECU is expecting exhaust temperature readings between specific thresholds, around 300-1200°F. When it sees values outside this range, it triggers the fault code.
What a healthy reading looks like
Expected exhaust temperature at idle: approx. 400-600°F; full load: around 1000-1200°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.
- 1Check the wiring and connector to exhaust temperature sensor 2 for damage or corrosion. Fix any issues found.
- 2Verify the exhaust temperature sensor 2 operation by testing its voltage output. Expected output at normal temperature is typically around 0.5V to 4.5V.
- 3Inspect the exhaust system for leaks that might skew temperature readings. Look for cracks or loose connections.
- 4If the sensor and wiring are good, use a scan tool to check for any software updates for the engine control unit (ECU).
Common causes
- Faulty exhaust temperature sensor
- Wiring issues (shorts, opens)
- Exhaust leaks
- Faulty ECU or software issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but exhaust performance may be affected. Get it checked soon.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return.
Why does this code pair with other SPN codes?
They often indicate related issues with the exhaust system or its sensors.
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