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P2455 is a diagnostic trouble code (DTC) for "Diesel Particulate Filter Differential Pressure Sensor Short to Voltage". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Diesel Particulate Filter Differential Pressure Sensor Short to Voltage
P2455 is an OBD-II generic code that the engine control module (ECM) has detected the diesel particulate filter differential pressure sensor (DPFPS) signal to the ECM is shorted to voltage.
The ECM monitors the particulate filter differential pressure sensor signal for high voltage signals, and if the voltage goes above 4.90 volts for more than 15 seconds, it sets the code P2455 and turns on the Check Engine Light.
The wiring or connection to the DPFPS is shorted.
The Check Engine Light will be illuminated and the code is set in ECM memory
The particulate filter may not go through a cleaning cycle and a clogged exhaust may happen
Loss of engine power if the filter gets clogged
Scans codes and documents the code in the ECM. Views the freeze frame data to see when the fault happened
Checks the DPFPS for damaged wiring or sensor connections and damage to the sensor
Checks the sensor for the proper resistance to specifications
Failing to verify the concern before attempting any repairs
Failing to identify the shorted harness from loose harness straps
Failing to check for any technical service bulletins that may have a fix for the code
Code P2455 causes the Check Engine Light to go on, and this alone will cause a failed emission test.
The code means that the DPFPS is shorted and cannot detect when the particulate filter needs to be cleaned and regenerated. This can lead to blocked exhaust system particulate filters.
Code P2455 is a common code for diesel vehicles with a particulate filter that requires regeneration and uses a DPFPS. This sensor is needed to know when the filter is getting clogged and needs to have the regeneration run.
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