P2459 OBD II Trouble Code Diesel Particulate Filter Regeneration Frequency

Symptoms of P2459 OBD II Trouble Code

  • Excessive black smoke from the exhaust
  • Other DPF codes usually accompany the P2459
  • Inability to maintain RPMs
  • Increased engine temperature
  • Overheated DPR housing or other exhaust components

Common Causes of P2459 OBD II Trouble Code

  • Defective DPF pressure sensor
  • Faulty exhaust pressure sensor
  • Insufficient diesel exhaust fluid
  • Incorrect diesel exhaust fluid
  • Shorted or open wiring to the DPF injection system
  • Defective PCM or a PCM programming error

Severity of P2459 OBD II Trouble Code

Because DPF regeneration is critical to maintaining desired exhaust back pressure, addressing a P2459 should be considered a priority. Symptoms of a P2459 code may include: