P2456 OBD II Trouble Code Diesel Particulate Filter Pressure Sensor A Circuit Intermittent

Symptoms of P2456 OBD II Trouble Code

  • Reduced engine performance
  • Excessive black smoke from engine exhaust
  • An increase in engine temperatures

Common Causes of P2456 OBD II Trouble Code

  • Exhaust leaks
  • Open/shorted circuit/s in the DPF pressure sensor A circuit
  • Defective DPF pressure sensor
  • Clogged, cracked, or collapsed DPF pressure sensor tubes/hoses
  • Diesel exhaust fluid reservoir empty
  • Incorrect diesel exhaust fluid

Severity of P2456 OBD II Trouble Code

Conditions that could cause this code may also lead to internal engine or fuel system damage and should be considered pressing. Symptoms of a P2456 code may include: