OBD Guide
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P1BAA

Hybrid/Electric Vehicle Battery 66 Circuit High Voltage

P1BAA is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 66 Circuit High Voltage. Common causes: high voltage battery fault, problems with the battery cooling system. Estimated repair cost: $167–889.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–889 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced vehicle power
  • The car goes into emergency mode
  • Error message on display
  • Disabling the hybrid system

Causes

  • High voltage battery fault
  • Problems with the battery cooling system
  • Malfunction of voltage sensors
  • Damage to high voltage wires
  • Errors in the battery management module

How to Fix

  1. High voltage system diagnostics
  2. Checking the condition of the battery and its elements
  3. Checking the battery cooling system
  4. Voltage Sensor Testing
  5. Replacing faulty components
  6. Reset errors and test drive

Related codes

P1BABP1BACP0AA6

FAQ

What does the P1BAA code mean?

P1BAA is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 66 Circuit High Voltage

What causes a P1BAA error code?

The most common causes of P1BAA include: High voltage battery fault; Problems with the battery cooling system; Malfunction of voltage sensors; Damage to high voltage wires.

How do I fix a P1BAA diagnostic trouble code?

To fix P1BAA: High voltage system diagnostics. Checking the condition of the battery and its elements. Checking the battery cooling system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1BAA?

Do not drive — repair immediately

How much does it cost to fix P1BAA?

The estimated repair cost for P1BAA is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat