The P245F: Diesel Particulate Filter Pressure Sensor ‘B’ Circuit Range/Performance code indicates that the pressure sensor ‘B’ circuit for the diesel particulate filter (DPF) is experiencing performance or range issues. This can result in inaccurate readings, which may prevent proper regeneration of the DPF. Possible causes include a faulty sensor, issues with wiring, or connector problems.
P245F – Quick Overview
Code | Information |
---|---|
Meaning | P245F: Diesel Particulate Filter Pressure Sensor ‘B’ Circuit Range/Performance |
Is it serious? | Moderate – performance issues in the pressure sensor circuit can lead to improper DPF regeneration, causing increased emissions and potential filter clogging. |
Possible causes | – Range or performance issues with the pressure sensor ‘B’ circuit – Faulty sensor – Wiring or connector issues |
How to diagnose? | – Test the range and performance of the pressure sensor ‘B’ circuit – Inspect and test the sensor and wiring – Replace faulty components if needed |
P245F Meaning
The P245F: Diesel Particulate Filter Pressure Sensor ‘B’ Circuit Range/Performance code indicates that the DPF pressure sensor ‘B’ is not operating within its normal range or is not performing as expected. The DPF pressure sensor monitors the difference in pressure across the filter to assess soot accumulation and trigger regeneration when needed. If the sensor’s performance is compromised, it may provide inaccurate data, causing regeneration failure and eventual DPF clogging.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to determine if any additional related fault codes are present. These can help pinpoint other issues affecting the DPF or sensor systems. | OBD-II Scanner |
Inspect the Pressure Sensor ‘B’ | Visually inspect the DPF pressure sensor ‘B’ for any visible signs of damage, such as cracks, corrosion, or improper mounting, which might affect its accuracy. | Flashlight, Safety Gloves |
Test the Sensor’s Range and Performance | Use a diagnostic tool to monitor the pressure sensor ‘B’ readings during various engine load conditions. Compare the readings against the manufacturer’s specifications to check if they are within the expected range. | Diagnostic Tool, Multimeter |
Inspect Wiring and Connectors | Examine the wiring and connectors for any damage, corrosion, or loose connections that could lead to erratic sensor readings or degraded performance. | Flashlight, Multimeter |
Check Sensor Circuit Continuity | Use a multimeter to check the continuity and resistance of the circuit to ensure that there are no shorts or open circuits causing the sensor to function improperly. | Multimeter |
Repair or Replace Wiring or Connectors | Repair or replace any damaged wiring or faulty connectors to ensure proper circuit operation and consistent sensor readings. | Wiring Repair Kit, Connector Tools |
Replace the Sensor if Faulty | If the sensor does not operate within the expected range or provides inconsistent performance, replace it with a new one to restore the proper functioning of the DPF system. | Replacement Sensor, Wrench Set |
Clear the Code and Test Drive | After completing the repairs, clear the P245F code using an OBD-II scanner. Take the vehicle for a test drive and monitor the DPF pressure readings to confirm that the sensor is performing correctly. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | Re-scan the vehicle after the test drive to ensure that the P245F code has not returned. If the code persists, further diagnostics will be required to identify and rectify the underlying issues. | OBD-II Scanner |

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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)