P2456 - Diesel Particulate Filter Pressure Sensor 'A' Circuit Intermittent/Erratic
P2456 Possible Causes
- Faulty Diesel Particulate Filter (DPF) Pressure Sensor
- Diesel Particulate Filter (DPF) Pressure Sensor harness is open or shorted
- Diesel Particulate Filter (DPF) Pressure Sensor circuit poor electrical connection
- Diesel particulate filter pressure sensor connecting hose is loose, cracked, or missing
- Diesel particulate filter pressure sensor connecting hose port is cracked or broken
- Excessive amount of soot or ash in the diesel particulate filter
First diagnose P2456 code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P2456 code
Labor: 1.0The cost of diagnosing the P2456 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
P2456 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P2456 DescriptionThe Powertrain Control Module (PCM) monitors the rationality of the Diesel Particulate Filter (DPF) pressure sensor during idle and part load operating conditions. The test fails when the diesel particulate filter pressure sensor signal value at idle is less than 0.15 kPa (0.022 psi). The test also fails when the diesel particulate filter pressure sensor signal value at part load is less than a minimum value or greater than a maximum value. These minimum and maximum values are based on the volume of exhaust.
P2456 More InformationNeed more information on how to fix the P2456 code?
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