OBD Guide
ENFRDEESPT

P1AAD

Phase W Open/Short Fault

P1AAD is an OBD-II diagnostic trouble code meaning: Phase W Open/Short Fault. Common causes: phase w wire break, short circuit in the circuit. Estimated repair cost: $56–278.

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

Symptoms

  • Reduced motor power
  • Switching to emergency mode
  • Check Engine light comes on
  • Unstable operation of the hybrid system
  • Loss of regenerative braking

Causes

  • Phase W wire break
  • Short circuit in the circuit
  • Motor fault
  • Inverter problems
  • Wiring harness damage

How to Fix

  1. Check the integrity of the wiring of phase W
  2. Check the resistance of the motor windings
  3. Diagnose the inverter
  4. Check connections and connectors
  5. Replace damaged components

Related codes

P1AAAP1AABP1AAC

FAQ

What does the P1AAD code mean?

P1AAD is an OBD-II diagnostic trouble code that indicates: Phase W Open/Short Fault

What causes a P1AAD error code?

The most common causes of P1AAD include: Phase W wire break; Short circuit in the circuit; Motor fault; Inverter problems.

How do I fix a P1AAD diagnostic trouble code?

To fix P1AAD: Check the integrity of the wiring of phase W. Check the resistance of the motor windings. Diagnose the inverter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1AAD?

Do not drive — repair immediately

How much does it cost to fix P1AAD?

The estimated repair cost for P1AAD is $56–278. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat