OBD Guide
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P1BCA

Hybrid/Electric Vehicle Battery 77 Circuit Low Voltage

P1BCA is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 77 Circuit Low Voltage. Common causes: high voltage battery fault, problems with balancing battery cells. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Reduced vehicle power
  • Increased fuel consumption (for hybrids)
  • Warning messages on the instrument panel
  • Battery charging problems
  • The car goes into emergency mode

Causes

  • High voltage battery fault
  • Problems with balancing battery cells
  • Battery management system (BMS) malfunction
  • Broken or damaged wiring
  • Contact corrosion

How to Fix

  1. High Voltage Battery System Diagnostics
  2. Checking the condition and balance of battery cells
  3. Checking Battery Management System (BMS) Operation
  4. Inspection and repair of wiring and contacts
  5. Replacing faulty battery components

Related codes

P1BCBP1BCDP1BC0

FAQ

What does the P1BCA code mean?

P1BCA is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 77 Circuit Low Voltage

What causes a P1BCA error code?

The most common causes of P1BCA include: High voltage battery fault; Problems with balancing battery cells; Battery management system (BMS) malfunction; Broken or damaged wiring.

How do I fix a P1BCA diagnostic trouble code?

To fix P1BCA: High Voltage Battery System Diagnostics. Checking the condition and balance of battery cells. Checking Battery Management System (BMS) Operation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1BCA?

Do not drive — repair immediately

How much does it cost to fix P1BCA?

The estimated repair cost for P1BCA is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat