Engine-Codes - Generic - P0A03

P0A03 Code - Motor Electronics Coolant Temperature Sensor Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0A03 code possible causes

  • Faulty Motor Electronics Coolant Temperature Sensor
  • Motor Electronics Coolant Temperature Sensor harness is open or shorted
  • Motor Electronics Coolant Temperature Sensor circuit poor electrical connection

|How is the P0A03 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.

|What is the cost to diagnose the P0A03 code

Labor: 1.0

The cost to diagnose the P0A03 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.

|What are P0A03 code possible symptoms?

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

|What is P0A03 code meaning?

The power management control Electronic Control Unit (ECU) detects HV coolant temperature using the coolant temperature sensor built into the inverter with converter assembly. The power management control ECU uses signals from the coolant temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the power management control ECU will limit inverter output to help prevent inverter overheating. The power management control ECU also detects malfunctions in the sensor based on the HV coolant temperature sensor values. The inverter with converter assembly detects malfunctions in the HV coolant temperature sensor and its wiring.

|Need more information with the P0A03 code?

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|P0A03 code information for specific makes

  • P0A03 BUICK Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage
  • P0A03 CADILLAC Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage
  • P0A03 CHEVROLET Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage
  • P0A03 DODGE Motor Electronics Coolant Temperature Sensor Circuit High
  • P0A03 GMC Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage
  • P0A03 LEXUS Motor Electronics Coolant Temperature Sensor Circuit High
  • P0A03 SATURN Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage
  • P0A03 TOYOTA Motor Electronics Coolant Temperature Sensor Circuit High

|Need help with a P0A03 code?

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