P049A OBD II Trouble Code Exhaust Gas Recirculation B Flow

How to quickly diagnose, repair, and what causes of a P049A code that indicates an exhaust gas recirculation EGR B flow problem.

Symptoms of P049A OBD II Trouble Code

  • Decreased engine performance
  • Excessive rich or lean exhaust
  • Delayed engine start-up (especially when cold)
  • Diminished fuel efficiency

Common Causes of P049A OBD II Trouble Code

  • Defective EGR valve
  • Carbon clogged EGR passage/s
  • Collapsed or cracked DPFE hoses
  • Faulty DPFE, MAP, or MAT Sensor
  • Open or shorted circuits to the EGR valve or related sensors

Severity of P049A OBD II Trouble Code

Overall engine performance and fuel efficiency may be adversely affected by the conditions which contribute to a code P049A. It should be categorized as severe.