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P2E43 Powertrain

Hybrid/EV Electronics Coolant Pump B Control Circuit Low

Hybrid/EV electronics coolant pump B reports a control circuit low condition. Power electronics cooling on this branch is impaired.

Affected components

  • Hybrid electronics coolant pump b
  • Power electronics coolant loop

Common causes

  • High likelihood: Pump motor or driver fault
  • Medium likelihood: Air or coolant level issue
  • Low likelihood: Connector pins corroded - high contact resistance

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • Reduced-power or limp mode may occur

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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