P2455: Diesel Particulate Filter Pressure Sensor A Circuit High
The DPF pressure sensor voltage is too high.
Green, yellow, red: three ways P2455 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Set once.
Schedule a repair
Light returns. Repair soon.
Stop and get help
Derate. Get it fixed.
Symptoms you might notice
- DPF light
Common causes, cheapest first
- Failed sensor
- Open wiring
- Plugged hose
What you can check before calling
- Inspect sensor hoses and connector
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Want the full story? Read our guide: DPF regeneration explained: passive, active and forced.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
More diesel & cummins codes
- P2002
Diesel Particulate Filter Efficiency Below Threshold (Bank 1) - P2463
Diesel Particulate Filter Restriction - Soot Accumulation - P242F
Diesel Particulate Filter Restriction - Ash Accumulation - P2459
Diesel Particulate Filter Regeneration Frequency - P2454
Diesel Particulate Filter Pressure Sensor A Circuit Low - P244A
Diesel Particulate Filter Differential Pressure Too Low
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P2455 mean?
P2455 means "Diesel Particulate Filter Pressure Sensor A Circuit High". The DPF pressure sensor voltage is too high.
Can I drive with code P2455?
It depends on what the vehicle is doing. Green: Set once. Yellow: Light returns. Repair soon. Red: Derate. Get it fixed.
What causes P2455?
The most common causes are: failed sensor; open wiring; plugged hose.
Is P2455 a serious code?
It can be. Derate. Get it fixed.
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