Engine-Codes - Toyota - P0A1A TOYOTA

P0A1A TOYOTA - Generator Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0A1A TOYOTA Possible Causes

  • Faulty Inverter with converter assembly
  • Inverter with converter assembly harness is open or shorted
  • Inverter with converter assembly circuit poor electrical connection

How is the P0A1A TOYOTA code repair?

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.

Tech Notes

Toyota recently released a warranty enhancement for 2010-2014 Prius, extending the coverage of the inverter/converter Intelligent Powertrain Module.

Toyota Bulletin Information:
Toyota has received some reports where the Intelligent Power Module (IPM) located inside the inverter assembly of the hybrid system may fail. This condition is indicated by hybrid system diagnostic trouble codes (DTCs): P0A94, P324E, P3004, and/or P0A1A. If one or more of these DTCs are detected, various warning lamps on the instrument panel will also illuminate and the vehicle will enter fail safe mode.
Although the Hybrid Inverter assembly is covered by Toyota’s New Vehicle Limited Warranty for 8 years or 100,000 miles (whichever occurs first), we at Toyota care about the customers’ ownership experience. Toyota is now extending the warranty coverage for repairs related to failure of the Intelligent Power Module (IPM).

What is the cost to diagnose the P0A1A TOYOTA code

Labor: 1.0

The cost to diagnose the P0A1A TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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When is the code detected?

The MG ECU located in the inverter with converter assembly monitors its internal operation and it will set DTCs when it detects malfunctions.

Possible Symptoms

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

P0A1A TOYOTA Meaning

The MG ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of those tests, the MG ECU checks the result of the generator CPU self-test. If the MG ECU detects a Fail from the generator CPU self-test, it will conclude that there is an internal malfunction in the generator CPU. The power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

More Information

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