OBD Guide

P2C47

Battery Isolation/Voltage Stabilization Control Circuit Intermittent

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

Symptoms

  • The high voltage system warning light comes on
  • Intermittent problems charging the high voltage battery
  • Hybrid system power reduction
  • High voltage system fault warnings on display
  • The car may go into emergency mode

Causes

  • Poor contact in the insulation monitoring circuit connectors
  • Broken or damaged wiring in the control circuit
  • Contact corrosion in a high voltage system
  • Battery insulation monitoring module malfunction
  • High Voltage System Grounding Problems

How to Fix

  1. Check the condition of the connectors and wiring of the insulation monitoring circuit
  2. Measure the insulation resistance of the high voltage system
  3. Check power supply and grounding of the insulation monitoring module
  4. Diagnose the insulation monitoring module using special equipment
  5. Repair only from an authorized dealer

Related codes

Error P2C47 by Vehicle Brand