Diesel Particulate Filter Temperature Sensor Range/Performance Problem
The DPF temperature sensor is reporting values out of expected range.
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What it means (plain English)
Your truck's computer thinks the temperature readings from the diesel particulate filter (DPF) sensor aren't right, either too high or low based on what it's supposed to see.
What the computer is actually seeing
The PCM expects the DPF temperature to be between 300°F (149°C) and 1400°F (760°C) during operation but is getting a signal lower than 15°F (-9°C) or higher than 1580°F (860°C).
What a healthy reading looks like
DPF temperature typically ranges between 300°F (149°C) and 1400°F (760°C) during normal operation; should not drop below 15°F or exceed 1580°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 connector at the DPF temperature sensor for damage and corrosion. Repair as necessary. If good, move to step 2.
- 22. Check the DPF temperature sensor input using a multimeter. Expected resistance should change with temperature. If the sensor fails the test, replace it. If it passes, move to step 3.
- 33. Use a scan tool to monitor real-time DPF temperature readings while the engine is running. If readings are still out of expected range, check the DPF condition and replace if contaminated or clogged.
Common causes
- Faulty DPF temperature sensor
- Wiring issues or poor connections
- DPF contamination or damage
- PCM malfunction
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but you should fix it soon to avoid further issues with the DPF and engine performance.
Will this code come back after clearing?
If the underlying problem is not fixed, yes, it will likely return.
Why does this code appear with DPF pressure codes?
The DPF pressure codes can show when the DPF is clogged, affecting the temperature readings.
Working a real vehicle right now?
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