OBD Guide
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P1AE3

Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage

P1AE3 is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage. Common causes: open or short circuit in the interlock circuit, poor contact in high voltage system connectors. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Hybrid system won't start
  • Hybrid system warning light on dashboard
  • Reduced power or complete loss of traction
  • Inability to charge high voltage battery

Causes

  • Open or short circuit in the interlock circuit
  • Poor contact in high voltage system connectors
  • Battery Energy Management Module malfunction
  • Problems with relays or fuses in the high voltage system
  • Corrosion of contacts in the interlock circuit

How to Fix

  1. Check the integrity of the high-voltage system interlock circuit
  2. Inspect and clean all contacts in the circuit
  3. Check voltage at battery energy management module
  4. Test high voltage system relays and fuses
  5. Replace the battery energy management module if necessary

Related codes

P1AE0P1AE1P1AE2

FAQ

What does the P1AE3 code mean?

P1AE3 is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage

What causes a P1AE3 error code?

The most common causes of P1AE3 include: Open or short circuit in the interlock circuit; Poor contact in high voltage system connectors; Battery Energy Management Module malfunction; Problems with relays or fuses in the high voltage system.

How do I fix a P1AE3 diagnostic trouble code?

To fix P1AE3: Check the integrity of the high-voltage system interlock circuit. Inspect and clean all contacts in the circuit. Check voltage at battery energy management module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1AE3?

Do not drive — repair immediately

How much does it cost to fix P1AE3?

The estimated repair cost for P1AE3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat