OBD Guide

P2BC8

Battery Charging System Positive Contactor B Control Circuit Range/Performance

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Battery charging problems
  • Reduced vehicle power
  • Inability to start the engine in hybrid models

Causes

  • Open or short circuit in the contactor control circuit
  • Positive contactor B fault
  • Problems with the charging control module
  • Corrosion or poor contact in connectors
  • Faulty relays or fuses

How to Fix

  1. Check the integrity of the contactor control circuit
  2. Check the condition of connectors and contacts
  3. Test the operation of positive contactor B
  4. Check fuses and relays
  5. Diagnose the charging system control module

Related codes

Error P2BC8 by Vehicle Brand