OBD Guide
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P1BC4

Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage

P1BC4 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage. Common causes: high voltage battery fault, problems with the charging system. Estimated repair cost: $167–889.

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

Symptoms

  • Reduced vehicle power
  • Switching to emergency mode
  • Warning messages on the dashboard
  • Reduced electric range

Causes

  • High voltage battery fault
  • Problems with the charging system
  • Damage to wiring or connectors
  • Battery control unit malfunction
  • Problems with contacts in the circuit

How to Fix

  1. Check the condition of the high-voltage battery
  2. Diagnose the charging system
  3. Inspect wiring and connectors for damage
  4. Check the operation of the battery control unit
  5. Repair only from an authorized dealer

Related codes

P1BC5P1BC6

FAQ

What does the P1BC4 code mean?

P1BC4 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage

What causes a P1BC4 error code?

The most common causes of P1BC4 include: High voltage battery fault; Problems with the charging system; Damage to wiring or connectors; Battery control unit malfunction.

How do I fix a P1BC4 diagnostic trouble code?

To fix P1BC4: Check the condition of the high-voltage battery. Diagnose the charging system. Inspect wiring and connectors for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1BC4?

Do not drive — repair immediately

How much does it cost to fix P1BC4?

The estimated repair cost for P1BC4 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat