The P0C4C: Hybrid Battery Pack Coolant Pump Supply Voltage Circuit Low refers to a fault where the supply voltage in the coolant pump circuit is lower than expected. This can result from wiring issues, a faulty coolant pump, or low voltage in the supply circuit, potentially leading to inadequate cooling of the hybrid battery.
P0C4C – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0C4C: Hybrid Battery Pack Coolant Pump Supply Voltage Circuit Low |
| Is it serious? | Yes, low voltage in the coolant pump supply circuit can prevent the pump from operating correctly, leading to overheating of the hybrid battery. |
| Possible causes | – Low voltage in the coolant pump supply circuit – Faulty coolant pump – Wiring issues |
| How to diagnose? | – Measure the supply voltage in the coolant pump circuit – Test the coolant pump – Check wiring and connections |
P0C4C Meaning
The P0C4C: Hybrid Battery Pack Coolant Pump Supply Voltage Circuit Low code indicates that the voltage supplying the hybrid battery pack’s coolant pump is lower than required for normal operation. This may prevent the pump from functioning efficiently, which could result in inadequate cooling and overheating of the hybrid battery.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to look for additional related fault codes that could provide further insight. | OBD-II Scanner |
| Measure the Supply Voltage in the Coolant Pump Circuit | Use a multimeter to measure the supply voltage at the coolant pump and compare it to manufacturer specifications. | Multimeter, Diagnostic Tool |
| Test the Coolant Pump | Test the coolant pump to verify that it is working properly and receiving sufficient voltage to operate. | Diagnostic Tool, Multimeter |
| Check Wiring and Connections | Inspect the wiring and connectors for damage, corrosion, or loose connections that could be causing low voltage in the supply circuit. | Flashlight, Multimeter |
| Clear the Code and Test Drive | After repairs, clear the code and perform a test drive to verify that the issue has been resolved. | OBD-II Scanner |
| Recheck for Codes | Re-scan the vehicle after the test drive to ensure the P0C4C code has been cleared and does not return. | OBD-II Scanner |
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