Diesel Trouble Codes

P2452 — Diesel Particulate Filter Pressure Sensor A Circuit (6.7 Cummins (EGR + DPF, pre-SCR))

P2452 is a DPF differential-pressure sensor circuit fault on the 6.7L Cummins 2007.5–2012 (EGR+DPF, pre-SCR).

Updated September 2, 2026

What it means

The ECM has detected an electrical/circuit fault in the DPF differential-pressure sensor A circuit. Generic definition is DPF differential-pressure sensor circuit fault. Typical on this platform: 6.7L Cummins 2007.5–2012 (EGR+DPF, pre-SCR).1

Most likely causes

  1. DPF differential-pressure sensor A electrical fault / open or short in sensor signal/return/5V supply — Circuit fault for the DPF differential-pressure sensor A. Generic definition: DPF differential-pressure sensor circuit fault.1
  2. Wiring/connector damage to DPF differential-pressure sensor A harness — Chafing, corrosion or loose connection at the sensor or ECM side can set a circuit fault.1
  3. DPF differential-pressure sensor A internal failure — Sensor out of range or internal electrical failure triggers circuit code.1

How to diagnose

  1. Verify code P2452 is present and check freeze-frame for conditions.
  2. Inspect DPF differential-pressure sensor A connector and wiring for damage, corrosion, oil contamination; repair as needed.
  3. Check sensor supply voltage, ground and signal circuit continuity to ECM per service info; look for opens/shorts.
  4. If wiring is intact, test/replace DPF differential-pressure sensor A and re-evaluate.
  5. After repair, clear codes and confirm no return of P2452 during a drive cycle with DPF pressure monitoring active.

Parts and tools you may need

Rough cost and difficulty

Parts cost varies by brand; labor depends on access to sensor and wiring. Diagnostic time is typically 0.5–1.5 h before parts replacement.

When to see a pro

If wiring faults are found in the engine bay harness or ECM connector, or if code returns after sensor replacement, have a qualified diesel technician perform pinpoint circuit tests to avoid misdiagnosis.

Sources

  1. Curated DTC seed — 6.7 Cummins (EGR + DPF, pre-SCR) (curated) ↩︎ ↩︎ ↩︎ ↩︎

Watch a repair

Third-party videos, not ours — for illustration. Confirm anything against the factory service information for your truck.

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