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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