Diesel Particulate Filter Pressure Sensor A Circuit High
The P2455 code means the vehicle's onboard diagnostic system has detected: Diesel Particulate Filter Pressure Sensor A Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $500 (parts and labor)
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What Are the Symptoms of P2455?
- Check Engine Light on
- DPF warning light may be on
- Regeneration may run when not needed
What Causes P2455? (Most Likely First)
- Open circuit or short to voltage in the sensor circuit High
- Failed DPF differential pressure sensor High
- Blocked pressure tube pinning the reading high Moderate
Can I Still Drive with P2455?
Short distances only. P2455 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Common Fixes by Vehicle
What techs usually find when diagnosing P2455 on specific vehicles — tap your vehicle for the fix and the exact part:
2008-2016 VW/Audi 2.0L TDI moderate DIY
P2455 = DPF differential pressure HIGH -- sensor reading excessive pressure. Either the DPF is actually clogged (needs regen or replacement), OR a sensing line is pinched/plugged. Check DPF soot loading via VCDS measured values first. If loading is >75%, force a service regen. If loading is normal but code is set, replace sensor and/or lines.
Labor: 1-3 hours2007-2010 Dodge Ram 6.7L Cummins moderate DIY
6.7L Cummins P2455 = DPF pressure sensor high. Check DPF soot load first with AlfaOBD or dealer tool. Soot load >75% means the DPF is genuinely clogged -- force a stationary regen, or do an extended highway drive. If soot load is normal, a pinched or contaminated sensing line is giving a false-high reading. Replace lines and sensor.
Labor: 1-3 hours2011-2016 Ford F-250/F-350 6.7L Power Stroke moderate DIY
6.7L PSD P2455 = DPF pressure high. Run FORScan or IDS to check DPF differential pressure and soot load. If soot load is high (over 100g), DPF needs a deep service regen or cleaning. If soot load is normal, replace the DPF pressure sensor and inspect the pressure tubes for blockage.
Labor: 1-3 hoursFrequently Asked Questions
Is this the same fix as P2454?
Nearly — same sensor, same wiring, opposite electrical direction. The additional check for the high variant is a blocked pressure tube, which can pin the differential reading high even with a healthy sensor.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2455?
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Circuit-high is the mirror of P2454 — signal stuck at the top of its range: an open circuit, short to voltage, or failed sensor.
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Check the sensor tubes too: a fully blocked tube on one side can pin the differential reading.
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Check connector and wiring, then replace the sensor if the circuit is sound.
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Meaning corroborated against this site's independently researched diesel-family pages for the same code (Isuzu, Kubota (2 families, sequence-corroborated with P2453/P2454/P2456)).
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
P2455 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
Which Vehicles Commonly Get P2455?
- Diesel vehicles and equipment with a diesel particulate filter (DPF)
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