Diesel Particulate Filter Pressure Sensor Range/Performance Problem (Bank 1)
Issues detected with the DPF pressure sensor on Bank 1.
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What it means (plain English)
The engine's computer thinks the pressure sensor for the diesel particulate filter (DPF) isn't reading correctly, which could mean the filter is clogged or the sensor is bad.
What the computer is actually seeing
The ECM is measuring pressure values from the DPF sensor and compares them to expected parameters. If the readings are outside the normal range, it triggers this code.
What a healthy reading looks like
Normal pressure values at idle should be around 1-3 inches of water column, and no more than 5 inches when driving. If values exceed this range significantly, it indicates a potential clog or sensor issue.
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 DPF pressure sensor wiring and connectors for damage or corrosion.
- 22. Check for any vacuum leaks in hoses connected to the sensor.
- 33. Verify the DPF itself is not clogged by assessing exhaust back pressure: it should not exceed 5 inches at full throttle.
- 44. Test the DPF pressure sensor with a multimeter; compare readings to expected values.
- 55. Clear the code and take the vehicle for a test drive to see if the code returns.
Common causes
- Clogged diesel particulate filter (DPF)
- Faulty DPF pressure sensor
- Leaking hoses connected to the pressure sensor
- Wiring issues or poor connections to the sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually safe to drive, but monitor the performance of the vehicle and exhaust output.
Will this code reappear after clearing?
If the underlying issue isn't fixed, the code will likely come back after some driving.
Why does this code pair with other codes?
Related codes often indicate simultaneous issues with the DPF system.
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