Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the car's battery cooling system. The pump that helps keep the battery cool is getting too much power, which could make it stop working right.
The P0C49 code indicates that the control circuit for the hybrid or electric vehicle's battery pack coolant pump is experiencing higher than expected voltage.
The P0C49 code is triggered when the Powertrain Control Module (PCM) detects an abnormally high voltage in the control circuit of the coolant pump for the hybrid or electric vehicle's battery pack. This could be due to a short circuit, faulty wiring, or a malfunctioning pump.
• Check Engine Light is on
• Overheating battery pack
• Reduced vehicle performance
• Faulty coolant pump
• Short circuit in the wiring
• Faulty PCM or control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the coolant pump.
• Test the coolant pump for proper operation.
• Repair or replace faulty wiring.
• Replace the coolant pump if it is defective.
• Replace or reprogram the PCM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance of the cooling system
• Check wiring for wear and tear
• Ensure proper operation of the coolant pump
Sensor Issue
• Avoid driving the vehicle until the issue is fixed to prevent battery damage.
• Consult a professional mechanic for an accurate diagnosis.
Check with the vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has become more common with the increase in hybrid and electric vehicles, as battery cooling is critical for performance and longevity.
High – This issue can lead to battery damage if not addressed promptly.
Driving with an overheating battery can be hazardous and may void warranty coverage.
• Vehicle at operating temperature
• Battery under load conditions
The coolant pump is typically located near the battery pack, often in the rear of the vehicle.
Q: Can I drive with a P0C49 code?
A: It's not recommended to drive with this code active, as it can lead to battery overheating and damage.
Q: How do I reset the P0C49 code?
A: After repairs, the code can be reset with an OBD-II scanner, but ensure the issue is fixed first.
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