OBD Guide
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P1B50

Hybrid/Electric Vehicle Battery 36 Circuit High Voltage

P1B50 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 36 Circuit High Voltage. Common causes: high voltage battery fault, problems with the charging system. Estimated repair cost: $167–2778.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–2778 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced vehicle power
  • The car goes into emergency mode
  • Inability to charge high voltage battery
  • Warning messages on the dashboard

Causes

  • High voltage battery fault
  • Problems with the charging system
  • DC-DC converter malfunction
  • Damage to high voltage wiring
  • Errors in the operation of the HCU control module

How to Fix

  1. Diagnosis of high-voltage battery condition
  2. Checking the charging system and DC-DC converter
  3. Inspect high-voltage wiring for damage
  4. Checking error codes in the HCU control module
  5. Replacing faulty high voltage system components

Related codes

P1B51P1B52P0AA1

FAQ

What does the P1B50 code mean?

P1B50 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 36 Circuit High Voltage

What causes a P1B50 error code?

The most common causes of P1B50 include: High voltage battery fault; Problems with the charging system; DC-DC converter malfunction; Damage to high voltage wiring.

How do I fix a P1B50 diagnostic trouble code?

To fix P1B50: Diagnosis of high-voltage battery condition. Checking the charging system and DC-DC converter. Inspect high-voltage wiring for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B50?

Do not drive — repair immediately

How much does it cost to fix P1B50?

The estimated repair cost for P1B50 is $167–2778. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat