Skip the auto shop - Our mechanics make house calls

P2455 OBD-II Trouble Code: Diesel Particulate Filter Differential Pressure Sensor Short to Voltage

Check Engine Light

P2455 code definition

Diesel Particulate Filter Differential Pressure Sensor Short to Voltage

What the P2455 code means

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.

What causes the P2455 code?

  • 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.

What are the symptoms of the P2455 code?

  • 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

How does a mechanic diagnose the P2455 code?

  • 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

Common mistakes when diagnosing the P2455 code?

  • 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

How serious is the P2455 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.

What repairs can fix the P2455 code?

  • Replacing a shorted DPFPS and run a regeneration to clean the particulate filter
  • Repairing the harness or connections to the DPFPS and run the particulate filter cleaning

Additional comments for consideration regarding the P2455 code

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.

Need help with a P2455 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed Related Trouble Codes: P2441: EVAP Vent Valve Stuck Open EVAP trouble...


Related questions

Q: Hello I have a 2006 f150 XLT with a 2v 4.6. It has a cold air intake from k

Hi, thanks for writing in. I'd be happy to help you. Code P2104 relates the throttle position control actuator, and code P2126 relates to the throttle position sensor. When either of these components is not working properly, this can cause...

Q: Range Rover Sport v6 2.7 with fault code p2455 but the car does not have any sensor or circuit for the dpf.

Hi there. The DPF apparently was not installed in all markets, which may cause issues if the vehicle did not have it when manufactured, but is transported and sold into a market which does require it. I would check with...

Q: Car idling and running rough

Hello, the engine is equipped with an electronic valve called an idle air control valve. The idle air control valve lets a metered amount of air into the engine at idle to have a comfortable idle and ensure the engine...