P045B OBD II Trouble Code Exhaust Gas Recirculation B Control Circuit Range Performance

How to quickly diagnose, repair, and info on symptoms and causes of a P045B trouble code which indicates an EGR B control circuit performance problem.

Symptoms of P045B OBD II Trouble Code

  • Open or short in the 5 Volt reference circuit
  • Open or short in the ground circuit
  • Open or short in the PCM controlled voltage circuit
  • Bad PCM (less likely)

Common Causes of P045B OBD II Trouble Code

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