OBD Guide

P2B2A

Hybrid/EV Electronics Coolant Pump A Overspeed - Dry Run

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Hybrid System Overheat Warning
  • Increased noise from the cooling pump
  • Reduced hybrid system efficiency
  • Loss of coolant
  • Activation of emergency operation

Causes

  • Coolant leak in the system
  • Coolant level sensor malfunction
  • Pump wiring problems
  • Failure of the electronic pump control unit
  • Mechanical damage to the pump

How to Fix

  1. Check the level and condition of the coolant
  2. Inspect the system for leaks
  3. Check the operation of the coolant level sensor
  4. Diagnose the electrical wiring and connectors of the pump
  5. Check the functionality of the electric pump

Related codes

Error P2B2A by Vehicle Brand