P0A94 - DC/DC Converter Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
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P0A94 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 do I fix code P0A94

Check 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.

Cost of diagnosing the P0A94 code

Labor: 1.0

The cost of diagnosing the P0A94 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P0a94 Description

The boost converter contains a booster IPM (Intelligent Power Module), which includes an IGBT (Insulated Gate Bipolar Transistor) and a reactor. The HV control ECU actuates the IGBT, which controls the current in the reactor.
The boost converter boosts the high-voltage direct current rated at 201.6 V to an approximate direct current voltage of 500 V. The inverter converts the voltage that has been boosted by the boost converter into alternating current, which is used for driving the MG1/MG2. When the MG1/MG2 operates as a generator, the alternating current of approximately 500 V from the MG1/MG2 is converted into direct current by the inverter.
Then, the boost converter drops this voltage to a direct current voltage rated at 201.6 V in order to charge the HV battery.
The HV control ECU uses a voltage sensor that is built into the boost converter to detect the high voltage (VL) before it is boosted. Also, it uses a voltage sensor that is built into the inverter to detect the high voltage (VH) after it has been boosted.
Based on the voltage before and after it has been boosted, the HV control ECU boosts it to a target voltage by controlling the operation of the boost converter.
OBDII Code P0a94 - DC/DC Converter Performance - AutoCodes.com

P0A94 More Information

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