P023B OBD II Trouble Code Charge Air Cooler Coolant Pump Control Circuit Low

How to easily diagnose, repair, and what causes a P023B code which indicates a low electrical condition within the charge air cooler coolant pump control circuit.

Symptoms of P023B OBD II Trouble Code

  • MIL (Malfunction Indicator Lamp) illuminated
  • Poor engine performance
  • Poor fuel mileage
  • Erratic/abnormal engine temperatures

Common Causes of P023B OBD II Trouble Code

  • Internal mechanical obstruction in coolant pump
  • Broken or damaged Coolant pump wiring harness
  • ECM (Engine Control Module) issue
  • Pin/connector problem. (e.g. corrosion, broken lock tab, etc.)

Severity of P023B OBD II Trouble Code

Severity in this case would be low. In most cases, this fault will not present any immediate safety concerns. That said, the drivability and performance of the vehicle may suffer, especially if left unattended long enough.