The P0C73: Motor Electronics Coolant Pump ‘A’ Control Performance refers to an issue with the performance of the coolant pump ‘A’ that cools the motor electronics. This could be due to a faulty coolant pump, problems with the control module, or wiring and circuit issues, which can result in overheating and reduced efficiency of the motor electronics.
P0C73 – Quick Overview
Code | Information |
---|---|
Meaning | P0C73: Motor Electronics Coolant Pump ‘A’ Control Performance |
Is it serious? | Yes, inadequate cooling can lead to overheating of the motor electronics, potentially damaging components and reducing performance. |
Possible causes | – Faulty coolant pump – Control module issues – Wiring or circuit problems |
How to diagnose? | – Test the coolant pump functionality – Inspect the control module – Check wiring and connections |
P0C73 Meaning
The P0C73: Motor Electronics Coolant Pump ‘A’ Control Performance code indicates that the control system for the coolant pump ‘A’ is not operating as expected. This can affect the cooling of the motor electronics, leading to potential overheating and reduced efficiency.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check for additional related fault codes that may provide further context for the issue. | OBD-II Scanner |
Test the Coolant Pump Functionality | Test the functionality of coolant pump ‘A’ to ensure it is operating properly and cooling the motor electronics efficiently. If the pump is faulty, replace it. | Multimeter, Diagnostic Tool |
Inspect the Control Module | Inspect the control module responsible for managing coolant pump ‘A’ to ensure it is sending the correct signals. Look for signs of malfunction or miscommunication. | Diagnostic Tool |
Check Wiring and Connections | Inspect the wiring and connections leading to the coolant pump and control module for signs of damage, loose connections, or corrosion. Repair or replace as needed. | Flashlight, Multimeter |
Clear the Code and Test Drive | After completing repairs, clear the fault code and take the vehicle for a test drive to ensure the issue has been resolved. | OBD-II Scanner |
Recheck for Codes | Re-scan the vehicle after the test drive to confirm that the P0C73 code has been cleared and does not return. | OBD-II Scanner |

OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes

Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)