Code Definition

P1453 — DPF pressure sensor excessive soot loading

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Nissan

About P1453

P1453 is a manufacturer-specific powertrain diagnostic trouble code recorded for Nissan vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1453 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1453 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

On this Nissan diesel the ECM monitors the differential pressure sensor connected across the diesel particulate filter (DPF) to judge how much soot the filter is holding, using the pressure drop between the inlet and outlet as an indication of restriction. DTC P1453 sets when that differential pressure reads abnormally high for the operating conditions, which the ECM interprets as excessive soot loading in the DPF or a fault in the pressure sensor or its hoses. A genuinely overloaded DPF can occur when regeneration has been repeatedly interrupted or prevented, for example by short trips, other...

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