OBD Guide

P2BC9

Battery Charging System Positive Contactor B Control Circuit Low

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine light comes on
  • Problems with charging a high-voltage battery
  • Reduced vehicle power
  • Errors in the operation of the hybrid system
  • The car may go into emergency mode

Causes

  • Open or short circuit in control circuit
  • Poor contact in connectors
  • Positive contactor B fault
  • Problems with the control module
  • Contact corrosion

How to Fix

  1. Check the integrity of the contactor control circuit
  2. Inspect and clean all electrical connections
  3. Check operation of contactor B
  4. Test the control module
  5. Replace faulty components

Related codes

Error P2BC9 by Vehicle Brand