AutoCodes – Generic – P0A93

P0A93 Code - Inverter 'A' Cooling System Performance

Quick Answer

The inverter converts the high-voltage direct current of the HV battery into the alternating current for the MG1 and the MG2. Common causes include Faulty Inverter cooling system, Inverter cooling system harness is open or shorted, Inverter cooling system circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0A93 indicates Inverter 'A' Cooling System Performance.
Common causes: Common causes include Faulty Inverter cooling system, Inverter cooling system harness is open or shorted, Inverter cooling system circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 14,144

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0A93 Description

The inverter converts the high-voltage direct current of the HV battery into the alternating current for the MG1 and the MG2. The inverter generates heat during the conversion process, and this heat could damage the inverter if a cooling system is unavailable. Therefore, similar to the MG1 and the MG2, the inverter is cooled by a dedicated cooling system, which consists of an electric water pump, cooling fan, and radiator. This cooling system is independent of the engine cooling system.

OBDII Code P0A93 - Inverter 'A' Cooling System Performance - AutoCodes.com — P0A93 Code - Inverter 'A' Cooling System Performance

What does this mean?

What are the Possible Causes of the DTC P0A93?

Faulty Inverter cooling system
Inverter cooling system harness is open or shorted
Inverter cooling system circuit poor electrical connection
Faulty Water pump with motor assembly
Faulty Cooling fan motor
Faulty No. 2 cooling fan motor
Faulty Inverter with converter assembly

How to Fix the DTC P0A93?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0A93 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Makes

P0A93 Lexus — Inverter 'A' Cooling System Performance
P0A93 Nissan — Inverter 'A' Cooling System Performance
P0A93 Toyota — Inverter 'A' Cooling System Performance

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.