OBD-II code family
Particulate Filter Pressure Sensing Faults (8 codes)
8 related fault descriptions. Use each full code and the exact vehicle service information to identify its circuit, monitored condition, and required tests.
Codes in this family
This is the complete published member list for this guide. Each code retains its own page; shared diagnostic context does not mean that every member has the same test or repair.
- P2452Diesel Particulate Filter Pressure Sensor "A" Circuit
- P2453Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance
- P2454Diesel Particulate Filter Pressure Sensor "A" Circuit Low
- P2455Diesel Particulate Filter Pressure Sensor "A" Circuit High
- P2456Diesel Particulate Filter Pressure Sensor "A" Circuit Intermittent/Erratic
- P2460Diesel Particulate Filter Pressure Sensor "B" Circuit Low
- P2461Diesel Particulate Filter Pressure Sensor "B" Circuit High
- P2462Diesel Particulate Filter Pressure Sensor "B" Circuit Intermittent/Erratic
What these codes mean
These entries compare the pressure-sensing circuit designated A, its range/performance, low, high and intermittent/erratic results, and the B low, high and intermittent/erratic results. Keep every identifier and condition. The group is a comparison of monitored pressure information, not a statement that all vehicles have two identical sensors or a single shared repair.
The distinction from filter loading matters. A low circuit result does not prove a clean filter; a high circuit result does not establish physical restriction. Range/performance does not certify healthy wiring, and an erratic result does not identify a loose conductor merely because a graph jumps. The actual monitor, signal definition and event conditions determine interpretation.
Manufacturer examples demonstrate the differences. The covered Ford 2023–2024 diesel summary assigns P2452 to an afterrun offset check and P2453 to operating rationality. The 2014 Passat CKRA table uses P2452 for a short-to-power condition and P2453 for afterrun offset detection. Neither example supports a universal rule that one engine-off display or a changed unplugged reading condemns the sensor.
Ford’s 2024–2025 gasoline summary separates analog low/high/intermittent checks from SENT circuit checks and pressure-functionality monitoring. It also lists pressure-sensor groups beyond A and B. A generic code title therefore cannot establish signal technology, engine type, sensor count, supply voltage, hose count or physical location.
Save the complete manufacturer scan, any failure suffix, status, freeze-frame, exact warning and recent exhaust/sensor work. Identify the relevant A or B assembly and its pressure reference using the vehicle information. Comparing two values is useful only when the procedure establishes that they are comparable under those conditions.
With the system off and exhaust cool, note safely accessible connector, loom and pressure-connection damage. Have qualified personnel use the identified diagram and protected equipment to check the relevant electrical and pressure paths. Do not jumper unknown pins, load a sensor return with an improvised lamp, blow through a connected sensor, wet a live connector or work beneath an unsupported vehicle.
Regeneration is a separate decision. Validate the pressure information and actual loading before selecting any cleaning or service-regeneration procedure. Do not reset soot or learned-pressure values to conceal a circuit fault, and do not adopt a generic motorway speed or duration from this code group.
Request the failed test, confirmed repair, any legitimate setup and the appropriate verification. Follow actual owner instructions and warning messages. Obtain assistance for overheating, smoke, unsafe power loss or a stop instruction; a pressure code does not provide a guaranteed fallback or travel distance.
Identify the circuit on your vehicle
Match the full DTC, reporting module, and any failure-type suffix to the service information for your exact year, make, model, engine, and equipment. An identifier alone does not establish installed hardware count, location, connector pinout, or a universal measurement.
Where the manufacturer publishes its own meaning for this code, that is the one to work from — it describes the actual component on your vehicle, which the generic definition cannot. Keep the generic description for what it is good for: it tells you which subject area the standard assigned the code to, which is useful context when the two appear to disagree. If they do disagree, follow the manufacturer.