P045C OBD II Trouble Code Exhaust Gas Recirculation B Control Circuit Low

How to quickly diagnose, repair, and info on symptoms and causes of a P045C trouble code which indicates a low control circuit condition with the EGR B system.

Symptoms of P045C OBD II Trouble Code

  • Extremely rough running engine
  • Check engine light illuminated
  • Drop in fuel economy
  • Decrease in power
  • No start or very difficult to start followed by rough idle

Common Causes of P045C OBD II Trouble Code

  • Short to ground
  • Short to battery voltage
  • Bad connector with pushed out pins
  • Corrosion in connector
  • Fouled EGR pintle
  • Failed EGR solenoid
  • Bad EGR
  • Faulty ECU or computer