Engine-Codes - Toyota - P0A1D TOYOTA

P0A1D TOYOTA Code - Hybrid Powertrain Control Module

- Code Popularity: 8,221 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P0A1D TOYOTA Code?

  • Faulty HV Control ECU
  • HV Control ECU harness is open or shorted
  • HV Control ECU circuit poor electrical connection

|How to Fix the P0A1D TOYOTA Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the P0A1D TOYOTA code?

Labor: 1.0

The cost to diagnose the P0A1D TOYOTA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0A1D TOYOTA code detected?

The power management control ECU (HV CPU) monitors its internal operation, it will set DTCs and perform fail-safe control when it detects the following malfunctions. If any of the following DTCs are output, replace the power management control ECU (HV CPU).

|What are P0A1D TOYOTA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0A1D TOYOTA Code Mean?

The HV control ECU performs diagnostic monitoring to verify proper operation of internal and external ECU systems. In this diagnostics monitor, the HV control ECU checks the REF signal from the motor main ECU
for errors.
If the HV control ECU detects an error in the REF signal, it will conclude that there is a malfunction in the motor main CPU, the REF signal or the HV control ECU. The HV control ECU illuminates the MIL and sets a Diagnostic Trouble Code (DTC).

Hybrid Powertrain Control Module

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