5461551 | Genuine Cummins® Exhaust Particulate Sensor

1. Monitor Soot Accumulation

• Measures particulate matter in the exhaust.

• Helps determine if the DPF is getting clogged.

2. Trigger DPF Regeneration

• Sends data to the Engine Control Unit (ECU).

• ECU decides when to initiate regeneration (burning off soot in the DPF).

• Prevents excessive backpressure and engine strain.

3. Ensure Emissions Compliance

• Keeps particulate emissions within legal limits.

• Helps vehicles pass emissions testing and meet environmental regulations.

4. Protect Engine & Turbo Components

• By monitoring soot buildup, it prevents:

  • DPF clogging

  • Excessive backpressure

  • Potential engine or turbo damage

5. Assist Diagnostic Systems

• If soot levels are abnormal, the sensor triggers warning lights or fault codes, helping mechanics identify problems early.

1. Check Engine or DPF Warning Light

• Most common symptom.

• You may see messages like:

  • “DPF Malfunction”

  • “Soot Accumulation Fault”

  • “Exhaust Particulate Sensor Fault”

2. Failed or Incomplete DPF Regeneration

• The vehicle may not perform DPF burn cycles properly.

• Soot accumulates in the Diesel Particulate Filter.

• Can cause excessive backpressure and reduced engine performance.

3. Reduced Engine Power or Limp Mode

• Some modern diesel engines reduce power to prevent damage when soot levels are unknown or excessive.

• Engine may feel sluggish or limited in speed.

4. Poor Fuel Economy

• Incorrect soot readings can affect regeneration cycles.

• Engine may burn more fuel than necessary trying to clean the DPF.

5. Excessive Smoke from Exhaust

• If the sensor fails, the ECU may not know the DPF is clogged.

• Can lead to visible black smoke during acceleration.

6. Fault Codes from Diagnostic Tool

• Codes like:

  • P2035, P2036, P2040 (various EPS or DPF sensor codes)

• Indicates a malfunction in the sensor circuit or readings.