The P0C49: Hybrid Battery Pack Coolant Pump Control Circuit High refers to a fault where the control circuit for the hybrid battery pack’s coolant pump is experiencing higher-than-expected voltage. This could be due to wiring problems, a faulty coolant pump, or control circuit issues, which may cause improper cooling of the hybrid battery pack.
P0C49 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0C49: Hybrid Battery Pack Coolant Pump Control Circuit High |
| Is it serious? | Yes, high voltage in the control circuit can damage the coolant pump, preventing proper cooling and potentially leading to hybrid battery overheating. |
| Possible causes | – High voltage in the coolant pump control circuit – Faulty coolant pump – Wiring issues |
| How to diagnose? | – Measure the voltage in the coolant pump control circuit – Test the coolant pump – Check wiring and connections |
P0C49 Meaning
The P0C49: Hybrid Battery Pack Coolant Pump Control Circuit High code indicates that the voltage in the control circuit of the coolant pump is higher than expected. This can cause the coolant pump to malfunction, potentially affecting the cooling system for the hybrid battery pack and leading to overheating or reduced performance.
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 could provide further insight into the issue. | OBD-II Scanner |
| Measure the Voltage in the Coolant Pump Control Circuit | Use a multimeter to measure the voltage in the control circuit and compare it to the manufacturer’s specifications to ensure it is within the proper range. | Multimeter, Diagnostic Tool |
| Test the Coolant Pump | Test the coolant pump to ensure it is operating correctly and that it is receiving the correct voltage without overload. | Diagnostic Tool, Multimeter |
| Check Wiring and Connections | Inspect the wiring and connections for any signs of damage, loose contacts, or corrosion that could cause high voltage in the control circuit. | Flashlight, Multimeter |
| Clear the Code and Test Drive | After repairs, clear the fault code and take the vehicle for a test drive to confirm the issue has been resolved. | OBD-II Scanner |
| Recheck for Codes | Re-scan the vehicle after the test drive to ensure the P0C49 code has been cleared and does not return. | OBD-II Scanner |
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