OBD Guide

P0B89

Hybrid/EV Battery Voltage Sense P Circuit High

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

Symptoms

  • The check engine or hybrid system light comes on
  • Hybrid system power reduction
  • Reduced electric range
  • Irregular operation of the hybrid system
  • Error messages on the display

Causes

  • P circuit voltage sensor malfunction
  • Damaged or corroded measurement circuit wiring
  • Problems with connectors in the measuring circuit
  • Battery management module malfunction
  • Problems with balancing battery cells

How to Fix

  1. Check the integrity of the wiring and connectors of circuit P
  2. Test P circuit voltage sensors
  3. Check the operation of the battery management module
  4. Perform battery cell balancing diagnostics
  5. If necessary, replace faulty components

Related codes

Error P0B89 by Vehicle Brand