Hybrid Battery Pack Coolant Pump Control Circuit High
The P0C49 code indicates that the hybrid battery pack coolant pump control circuit has detected a high voltage condition. This pump is responsible for circulating coolant through the hybrid battery pack to maintain optimal operating temperature. A high voltage signal in the control circuit suggests a malfunction in the pump motor, wiring, or control module, which can lead to inadequate cooling and potential battery overheating.
01. Most Common Causes
- Faulty hybrid battery coolant pump
- Short to voltage in pump control circuit wiring
- Failed hybrid battery control module
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced hybrid system performance or warning messages
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Inspect the coolant pump and its connector for damage or corrosion.
Step 3: Test the pump control circuit for voltage and continuity using a multimeter.
Step 4: Check the pump operation by commanding it on with a scan tool.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can lead to battery overheating and potential damage. Have the vehicle inspected immediately.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the exact cause and labor rates.