P245E – Diesel Particulate Filter Pressure Sensor B Circuit

Symptoms

and severity

The storage conditions of this code can cause internal damage to the engine or fuel system and must be addressed immediately. Symptoms of a P245E code may include:

Excessive black smoke from the exhaust
Decreased engine performance
Higher engine temperatures
Higher transmission temperatures

Causes

Potential causes for setting this code are as follows:

The diesel exhaust fluid tank is empty
Incorrect diesel exhaust fluid
Faulty DPF pressure sensor
Clogged DPF pressure sensor tubes/pipes
Open or shorted circuit(s) in the DPF pressure sensor B circuit
Ineffective DPF regeneration
Malfunctioning active DPF regeneration system

Diagnostic and Repair Procedures

A good starting point is always to check the technical service bulletins (TSBs) for your specific vehicle. Your issue might be a known problem with a published fix from the manufacturer, which can save you time and money during diagnosis.

A diagnostic scanner, a digital volt/ohmmeter, and the manufacturer’s service manual will be needed to diagnose a P245E code. An infrared thermometer may also be helpful.

I usually begin my diagnosis with a visual inspection of the related wiring harnesses and connectors. I would pay close attention to wiring routed near hot exhaust components and sharp edges. Test the battery and battery terminals at this point and check the alternator output.

Next, I would connect the scanner and retrieve all stored codes and freeze frame data. I would write this down for future reference. This can be helpful if the code proves to be intermittent. Now, clear the codes and test-drive the vehicle.

If the code resets immediately, check that the diesel exhaust fluid is present (if applicable) and is the correct type. The most common cause for storing this code is a lack of diesel exhaust fluid. Without the proper type of diesel exhaust fluid, the DPF will not regenerate effectively, potentially causing an increase in exhaust pressure.

Refer to the manufacturer’s service manual for how to test the DPF pressure sensor using the DVOM. If the sensor does not meet the manufacturer’s resistance specifications, it should be replaced. If the sensor appears good, check for any obstructions and/or breaks in the DPF pressure sensor supply pipes. Clean or replace the pipes as needed. High-temperature silicone pipes should be used.

If the sensor is operational and the supply lines are intact, begin testing the system circuits. Disconnect all related control modules before testing resistance and/or continuity with the DVOM. Repair or replace any open or shorted circuits as necessary.

Additional Diagnostic Notes:

If the DPF pressure sensor hoses are melted or cracked, they may need to be rerouted after replacement
Consult the owner’s/service manual to determine if your vehicle is equipped with an active or passive DPF regeneration system
Clogged sensor ports and blocked sensor tubes are common

P245F – Diesel Particulate Filter Pressure Sensor Circuit Range / Performance B

Symptoms

and severity

This code should be considered urgent, as it indicates conditions that could lead to internal damage to the engine or fuel system. The symptoms of a P245F code may include:

Decreased engine performance
Excessive black smoke from the exhaust
Increased engine temperatures
Transmission temperatures higher than normal

Causes

Potential causes for this code being set are as follows:

Clogged DPF pressure sensor tubes/pipes
Faulty DPF pressure sensor
The diesel exhaust fluid tank may be empty
Poor quality diesel exhaust fluid
Open or shorted circuit(s) in the DPF pressure sensor B circuit
Ineffective DPF regeneration
The active DPF regeneration system is inoperative

Diagnostic and Repair Procedures

A good starting point is always to check the technical service bulletins (TSBs) for your specific vehicle. Your issue may be a known problem with a published fix from the manufacturer and can save you time and money during diagnosis.

A manufacturer’s service manual, a diagnostic scanner, and a digital volt/ohmmeter will be essential for diagnosing a P245F code. An infrared thermometer may also be helpful.

I would begin my diagnosis with a visual inspection of the related wiring harnesses and connectors; pay close attention to wiring routed near hot exhaust components and/or sharp edges. Test the alternator output, check the battery and battery terminal ends at this time.

I would continue by connecting the scanner and retrieving all stored codes and freeze frame data. Be sure to note this information for future reference. Clear the codes and test-drive the vehicle.

Check that the diesel exhaust fluid is present (if applicable) and is the correct type, especially if the code resets immediately. A lack of diesel exhaust fluid is likely the most common cause for this code being stored. The DPF will not regenerate effectively without the proper type of diesel exhaust fluid. Poor DPF regeneration will lead to increased exhaust pressure.

Using the DVOM, test the DPF pressure sensor. Consult the manufacturer’s service manual for instructions. The sensor should be replaced if it does not meet the manufacturer’s resistance specifications.

Check for obstructions and/or breaks in the DPF pressure sensor supply pipes, if the sensor checks out. Clean or replace the pipes as needed (high-temperature silicone hoses should be used).

If the supply lines are intact and the sensor is operational, begin testing the system circuits. Disconnect all associated controllers before testing resistance and/or continuity with the DVOM. Repair or replace any open or shorted circuits as necessary.

Additional Diagnostic Notes:

Clogged sensor ports and clogged sensor tubes are common
Consult the owner’s/service manual to determine if your vehicle is equipped with an active DPF regeneration system or a passive system
If the DPF pressure sensor hoses are melted or cracked, they may need to be rerouted after replacement

P2460 – Diesel Particulate Filter Pressure Sensor B Circuit Low

Symptoms and Severity

Conditions that may trigger the storage of this code should be considered urgent as they can damage the internal engine or fuel system. Symptoms of a P2460 code may include:

Increased engine temperatures
Transmission temperatures higher than normal
Decreased engine performance
Excessive black smoke from the exhaust

Causes

Potential causes for setting this code are as follows:

Exhaust leaks
Clogged DPF pressure sensor tubes/pipes
Open or shorted circuit(s) in the DPF pressure sensor B circuit
Faulty DPF pressure sensor

Diagnostic and Repair Procedures

A digital volt/ohmmeter, a manufacturer’s service manual, and a diagnostic scanner will be needed to diagnose a P2460 code.

Begin your diagnosis with a visual inspection of the related wiring harnesses and connectors. Carefully inspect wiring routed near hot exhaust components and/or sharp edges. Test the alternator output, battery voltage, and battery terminal ends at this time.

You can proceed by connecting the scanner and retrieving all stored codes and freeze frame data. Be sure to note this information for future reference. Now, clear all stored codes and test the vehicle. Using the DVOM, test the DPF pressure sensor. Refer to the manufacturer’s maintenance manual for instructions. The sensor should be replaced if it does not meet the manufacturer’s resistance specifications.

The DPF pressure sensor supply lines should be checked for obstructions and/or damage if the sensor checks out. Replace the lines as needed (high-temperature silicone lines are recommended).

You can begin testing the system circuits if the supply lines are intact and the sensor is operational. Before testing circuit resistance and/or continuity (with the DVOM), disconnect all related controllers. Open or shorted circuits should be repaired or replaced.

Additional Diagnostic Notes:

Repair exhaust leaks before attempting to diagnose this code
Clogged sensor ports and blocked sensor tubes are common
DPF pressure sensor lines that have melted or been cut may need to be rerouted after replacement…

P2461 – Diesel Particulate Filter Pressure Sensor B Circuit High

Symptoms and Severity

The conditions that could lead to this code may also cause internal damage to the engine or fuel system and should be considered urgent. Symptoms of a P2461 code may include:

Excessive black smoke from the exhaust
Increased engine temperatures
Transmission temperatures higher than normal
Decreased engine performance

Causes

Potential causes for setting this code are as follows:

Exhaust leaks
Clogged DPF pressure sensor tubes/pipes
Open or shorted circuit(s) in the DPF pressure sensor circuit B
Faulty DPF pressure sensor
The diesel exhaust fluid tank may be empty
Poor quality diesel exhaust fluid
Ineffective DPF regeneration
The active DPF regeneration system is inoperative

Diagnostic and Repair Procedures

A good starting point is always to check the technical service bulletins (TSB) for your specific vehicle. Your issue might be a known problem with a published fix from the manufacturer, which can save you time and money during diagnosis.

To diagnose a P2461 code, a digital volt/ohmmeter, the manufacturer’s service manual, and a diagnostic scanner will be needed.

I recommend starting your diagnosis with a visual inspection of the related wiring harnesses and connectors. Inspect the wiring routed near hot exhaust components and/or sharp edges. Be sure to check the alternator output, battery voltage, and battery terminal ends at this time.

Continue by connecting the scanner and retrieving all stored codes and freeze frame data. Remember to note this information for future reference and then clear all stored codes.

Use the DVOM and follow the manufacturer’s recommendations to test the DPF pressure sensor. Refer to the service manual for specific instructions. Any sensor that does not meet the manufacturer’s resistance specifications should be replaced.

The DPF pressure sensor supply tubes should be checked for obstructions and/or damage if the sensor checks out. Replace any burned, cracked, or collapsed tubes (high-temperature silicone tubes are recommended).

If the sensor supply lines are intact and the sensor is operational, you can begin testing the system circuits. To avoid damaging the PCM, disconnect all related controllers before testing resistance and/or continuity with the DVOM.

Additional Diagnostic Notes:

Check the DPF regeneration fluid before attempting to diagnose this code
Clogged sensor ports and blocked sensor tubes are common when this code is stored
DPF pressure sensor tubes that have melted or been cut may need to be rerouted after replacement

P2462 Intermittent Diesel Particulate Filter Pressure Sensor Circuit

Symptoms and Severity

The conditions that may trigger this code can also cause internal damage to the engine or fuel system and should be considered urgent. Symptoms of a P2462 code may include:

Reduced engine performance
Excessive black smoke from engine exhaust
Increased engine temperatures

Causes

Potential causes for this code definition include:

Exhaust leaks
Open/short circuit(s) in DPF pressure sensor circuit B
Faulty DPF pressure sensor
Clogged, cracked, or collapsed DPF pressure sensor tubes/pipes
Empty diesel exhaust fluid tank
Incorrect diesel exhaust fluid

Diagnostic and Repair Procedures

A good starting point is always to check the technical service bulletins (TSBs) for your specific vehicle. Your issue might be a known problem with a published manufacturer fix that could save you time and money during diagnosis.

To properly diagnose a P2462, I need a digital volt/ohmmeter, manufacturer service manual, and diagnostic scanner.

I would begin my diagnosis with a visual inspection of related wiring harnesses and connectors. I would inspect wiring routed near hot exhaust components and/or sharp edges. This saves time if I’m certain to check alternator output, battery voltage, and battery terminal ends at this point.

My next step would be connecting the scanner and retrieving all stored codes and freeze frame data. I would write down this information for future reference, then clear all stored codes.

Using the DVOM, I would follow manufacturer recommendations for testing the DPF pressure sensor. I would consult the service manual for specific instructions. Sensors that don’t meet manufacturer resistance specifications should be replaced.

If the sensor checks out, I would continue by checking DPF pressure sensor supply lines for obstructions and/or damage. I would replace lines that are burned, cracked, or collapsed (high-temperature silicone lines are recommended).

If the supply sensor lines are intact and the sensor is operational, I would proceed with testing system circuits. To avoid PCM damage, I always disconnect related controllers before testing resistance and/or continuity with the DVOM.

Additional Diagnostic Notes:

DPF regeneration fluid should be checked before diagnosing this code
When P2462 is stored, I’ve found that clogged sensor ports and blocked sensor tubes are common
DPF pressure sensor lines that have melted or been cut may need rerouting after replacement

P2463 Diesel Particulate Filter Restriction – Soot Accumulation

Severity and Symptoms

Since DPF restriction can lead to engine or fuel system damage, this code should be considered severe.

Symptoms of a P2463 code may include:

Other DPF and DPF regeneration codes will likely accompany a stored P2463 code
Excessive black smoke from the exhaust
Inability to produce and maintain desired RPM levels
Increased engine temperature
Overheated DPF housing or other exhaust components

Possible causes of this engine code include:

Excessive soot buildup due to insufficient DPF regeneration
Faulty DPF pressure sensor
Insufficient diesel exhaust fluid
Incorrect diesel exhaust fluid
Shorted or open wiring to the DPF injection system or exhaust pressure sensor
Faulty PCM or PCM programming error
Faulty exhaust pressure sensor

Diagnostic and Repair Procedures

A good starting point is always to check the technical service bulletins (TSBs) for your specific vehicle. Your problem may be a known issue with a known fix published by the manufacturer and can save you time and money when diagnosing.

A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reputable vehicle information source (like All Data) are just a few of the tools I would use to diagnose a stored P2463.

I start my diagnostic process by inspecting all wiring harnesses and connectors related to the system. I would carefully inspect harnesses that are located near hot exhaust components and sharp exhaust shields. Other DPF and DPF regeneration codes must be repaired before attempting to diagnose and repair a P2463 code.

I would proceed by connecting the scanner to the diagnostic port and retrieving all stored fault codes and freeze frame data. This information can be useful later, so I like to write it down before clearing the codes and testing the vehicle.

If the code immediately resets, use the DVOM and follow the manufacturer’s recommendations to test the DPF pressure sensor. If the sensor does not meet the manufacturer’s resistance specifications, it must be replaced.

If the manufacturer-recommended DPF regeneration procedures have not been followed, suspect an actual DPF restriction due to excessive soot buildup. Initiate the regeneration procedure and see if it corrects the excessive soot buildup condition.

Additional Diagnostic Notes:

DPF pressure sensor pipes/lines are prone to clogging and collapsing
Incorrect/insufficient diesel exhaust fluid is a very common cause of DPF regeneration failure/soot buildup
If the vehicle in question is equipped with a passive regeneration system, carefully follow the manufacturer’s DPF maintenance intervals to prevent excessive soot buildup

OBD2 Fault Codes

P2463
P2463-00
P2463-09
P2463-12
P2463-21
P2463-22

Technical Terms

Diesel Particulate Filter (DPF)
Soot Accumulation
DPF Regeneration
DPF Differential Pressure Sensor
Malfunction Indicator Light (MIL)

Vehicle Makes and Models

Mercedes-Benz
Audi
Volkswagen
Ford
Peugeot
Citroën
Renault

Websites and Forums

Forum-mercedes.com

In French

Particulate Filter
DPF
Soot
Clogging
Fault
Engine Light
Diagnostic
Repair

In English

Diesel Particulate Filter (DPF)
Soot Accumulation
DPF Regeneration
DPF Differential Pressure Sensor
Malfunction Indicator Light (MIL)

P2464 – Diesel Particulate Filter Differential Pressure Too Low, Row 2

P2464 – Diagnosis and Solutions 🚗

🛠 Possible Causes

🚨 Faulty Diesel Particulate Filter Differential Pressure Sensor
🔌 Sensor Wiring Harness is Open or Short-Circuited
⚠️ Poor Electrical Connection in the Sensor Circuit

🔧 How to Fix Code P2464

🔍 Check the causes listed above.
📎 Visually inspect the wiring harness and connectors.
⚡ Look for damaged components: broken, bent, corroded, or poorly connected pins.

⚠️ Possible Symptoms

📛 Check Engine Light On (or “Service Engine Soon” message).

📖 Meaning of Code P2464

The Powertrain Control Module (PCM) detects an anomaly in the diesel particulate filter differential pressure sensor. This code is triggered when the sensor values fall outside the manufacturer’s specifications.

✅ Tip: Start by inspecting the electrical circuit before replacing the sensor!

P2465 – Diesel Particulate Filter Differential Pressure Too High, Row 2

P2465 Possible Causes

Faulty diesel particulate filter differential pressure sensor
Diesel particulate filter differential pressure sensor harness is open or shorted
Poor electrical connection in diesel particulate filter differential pressure sensor circuit

How to Fix Code P2465

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 connector pins.

P2465 Symptoms

Possible symptoms

Illuminated engine light (or service engine soon warning light)

P2465 Meaning

The Powertrain Control Module (PCM) monitors the diesel particulate filter differential pressure sensor. The OBDII code is set when the diesel particulate filter differential pressure sensor is outside factory specifications.

P2466 – Exhaust Gas Temperature Sensor Circuit, Bank 2 Sensor 3

P2466 Possible Causes

Faulty Exhaust Gas Temperature Sensor (EGTS), Bank 2 Sensor 3
Exhaust Gas Temperature Sensor, Bank 2 Sensor 3 harness is open or short-circuited
Poor electrical connection in Bank 2 Sensor 3 circuit of the Exhaust Gas Temperature Sensor
Exhaust leaks
Excessive particulate buildup on the sensor

How to Fix Code P2466

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2466

Symptoms

Possible

Engine light on (or service engine soon warning light)

P2466 Meaning

The Powertrain Control Module (PCM) continuously monitors the Exhaust Gas Temperature Sensor (EGTS) for proper circuit continuity and out-of-range high values. The EGTS is located in front of the Diesel Oxidation Catalyst (DOC) and/or in front of the Diesel Particulate Filter (DPF). The EGTS detects exhaust gas temperature and converts it to voltage, sending it back to the PCM with the voltage signal to control engine conditions for effective emission reduction. The PCM sets the OBDII code P2466 when the Exhaust Gas Temperature Sensor is outside factory specifications.

P2467 – Exhaust Gas Temperature Sensor Circuit Range/Performance, Bank 2 Sensor 3

P2467 Possible Causes

Faulty Exhaust Gas Temperature Sensor (EGTS), Bank 2 Sensor 3
Exhaust Gas Temperature Sensor, Bank 2 Sensor 3 wiring harness is open or short-circuited
Poor electrical connection in Bank 2 Sensor 3 circuit of the Exhaust Gas Temperature Sensor
Exhaust leaks
Excessive particulate buildup on the sensor

How to Fix Code P2467

P2467

Symptoms

Possible

Engine light on (or service engine soon warning light)

P2467 Meaning

The Powertrain Control Module (PCM) continuously monitors the Exhaust Gas Temperature Sensor (EGTS) for proper circuit continuity and high out-of-range values. The EGTS is located in front of the Diesel Oxidation Catalyst (DOC) and/or in front of the Diesel Particulate Filter (DPF). The EGTS detects exhaust gas temperature and converts it to voltage, sending it back to the PCM with the voltage signal to control engine conditions for effective emission reduction. The PCM sets the OBDII code P2467 when the Exhaust Gas Temperature Sensor is outside factory specifications.