OBD Guide
ENFRDEESPT

P1A56

Hybrid/EV System Voltage

P1A56 is an OBD-II diagnostic trouble code meaning: Hybrid/EV System Voltage. Common causes: high voltage battery fault, problems with voltage converter. Estimated repair cost: $167–889.

Severity
🔴 High
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
  • Problems with charging a high-voltage battery
  • Unusual sounds from the engine compartment

Causes

  • High voltage battery fault
  • Problems with voltage converter
  • Breakage or damage to high-voltage cables
  • Energy management system malfunction
  • Short circuit in the electrical circuit

How to Fix

  1. Diagnostics of voltage in a high-voltage system
  2. Checking the condition of high-voltage cables and connections
  3. Voltage converter testing
  4. Energy management system diagnostics
  5. Do not attempt repairs yourself - contact a hybrid specialist

Related codes

P1A57P1A58P0AA6

FAQ

What does the P1A56 code mean?

P1A56 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV System Voltage

What causes a P1A56 error code?

The most common causes of P1A56 include: High voltage battery fault; Problems with voltage converter; Breakage or damage to high-voltage cables; Energy management system malfunction.

How do I fix a P1A56 diagnostic trouble code?

To fix P1A56: Diagnostics of voltage in a high-voltage system. Checking the condition of high-voltage cables and connections. Voltage converter testing. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1A56?

Do not drive — repair immediately

How much does it cost to fix P1A56?

The estimated repair cost for P1A56 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat