Engine-Codes - Lexus - P0AF0 Lexus

P0AF0 Lexus Code - Drive Motor Inverter Temperature Sensor 'A' Circuit High

- Code Popularity: 985 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code P0AF0 Lexus?

  • Faulty Inverter With Converter Assembly
  • Inverter With Converter Assembly harness is open or shorted
  • Inverter With Converter Assembly circuit poor electrical connection
  • Faulty HV Control ECU

How to Fix the P0AF0 Lexus 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 Code P0AF0 Lexus?

Labor: 1.0

The cost to diagnose the P0AF0 Lexus 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.

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What are Code P0AF0 Lexus Possible Symptoms?

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

What Does the P0AF0 Lexus Code Mean?

The HV control ECU uses a temperature sensor, which is built into the inverter, to detect the temperature of the motor inverter. The same cooling system that is routed to the MG1 and MG2 cools the inverter. This cooling system is independent from the engine cooling system.
The characteristic of the motor inverter temperature sensor is the same as the boost converter temperature sensor.
The HV control ECU limits the load based on the signals transmitted by the motor inverter temperature sensor, in order to check the effectiveness of the inverter cooling system and prevent the inverter from overheating. Furthermore, the HV control ECU detects a malfunction in the wiring of the motor inverter temperature sensor, as well as in the sensor itself.

P0AF0 Lexus Code - Drive Motor Inverter Temperature Sensor 'A' Circuit High

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