AutoCodes – Lexus – P0C73 Lexus

P0C73 Lexus Code - Motor Electronics Coolant Pump 'A' Control Performance

Quick Answer

The inverter water pump assembly transmits rotation speed information to the power management control ECU (HV CPU). 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: P0C73 Lexus indicates Motor Electronics Coolant Pump 'A' Control 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 5,827

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 Feb 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0C73 Lexus Description

The inverter water pump assembly transmits rotation speed information to the power management control ECU (HV CPU). The power management control ECU (HV CPU) monitors the speed and detects malfunctions.

OBDII Code P0C73 Lexus - Motor Electronics Coolant Pump 'A' Control Performance - AutoCodes.com — P0C73 Lexus Code - Motor Electronics Coolant Pump 'A' Control Performance

What does this mean?

What are the Possible Causes of the DTC P0C73 Lexus?

Faulty Inverter cooling system
Inverter cooling system harness is open or shorted
Inverter cooling system circuit poor electrical connection
Inverter water pump assembly
Power management control ECU

How to Fix the DTC P0C73 Lexus?

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 P0C73 Lexus 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.

Need more information about the P0C73 Lexus code?

Need more information on how to fix the P0C73 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0C73 Lexus code diagnosed by a professional: Find a repair shop in your area

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.

Frequently Asked Questions about P0C73 Lexus Code

1. What are the common symptoms of OBDII code P0C73 in a Lexus related to the Motor Electronics Coolant Pump 'A' Control Performance?

- Common symptoms include overheating engine, illuminated check engine light, reduced engine performance, and potential coolant leaks.

2. What are some possible causes of OBDII code P0C73 in a Lexus?

- Possible causes may include a faulty coolant pump, issues with the coolant pump control module, electrical wiring problems, or low coolant levels.

3. How can I diagnose the underlying issue causing OBDII code P0C73 in my Lexus?

- Diagnosing the issue typically involves conducting a thorough inspection of the coolant pump, checking the control module, testing electrical connections, and ensuring proper coolant levels.

4. Can driving with OBDII code P0C73 in a Lexus cause further damage to the vehicle?

- Continuing to drive with this code can potentially lead to engine overheating, which may result in severe engine damage if not addressed promptly.

5. What are some repair tips for fixing OBDII code P0C73 in a Lexus?

- Repair tips may include replacing the coolant pump, repairing or replacing the control module, fixing any wiring issues, and performing a coolant system flush and refill.

6. How much does it typically cost to repair OBDII code P0C73 in a Lexus?

- Repair costs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Can I reset the check engine light after fixing OBDII code P0C73 in my Lexus?

- Yes, once the underlying issue is resolved and the fault codes are cleared, the check engine light can be reset using an OBDII scanner.

8. Is it safe to drive my Lexus with OBDII code P0C73 if the engine is not overheating?

- It is not recommended to drive the vehicle with this code present, as it indicates a malfunction that can potentially lead to engine overheating and further damage.

9. How urgent is it to address OBDII code P0C73 in a Lexus?

- It is essential to address this code promptly to prevent potential engine damage and ensure the vehicle operates safely and efficiently.

10. Can a DIY enthusiast fix OBDII code P0C73 in a Lexus, or is it best left to professional mechanics?

- While some repairs related to this code may be possible for experienced DIYers, diagnosing and fixing the underlying issue often requires specialized tools and expertise, so seeking professional help is recommended.