What Does P0C47 Mean?
The hybrid battery pack coolant pump control circuit has an open condition, meaning no electrical continuity exists between the control module and the pump. The pump cannot be controlled or energized due to this break in the circuit.
Safety Warning
Without coolant circulation, the hybrid battery will overheat rapidly under use. Vehicle will enter reduced power mode or shut down to prevent battery damage, potentially leaving you stranded.
Common Causes
35%
Broken or disconnected wiring between control module and coolant pump
30%
Failed coolant pump motor with open windings
20%
Blown fuse or open relay in pump power circuit
10%
Corroded or loose connector terminals at pump or control module
5%
Control module internal driver circuit failure
Diagnostic Steps
1
Step 1: Check all fuses and relays related to hybrid battery coolant pump circuit
2
Step 2: Inspect pump connector and wiring harness for damage, corrosion, or disconnection
3
Step 3: Measure resistance of pump motor windings to verify not open circuit
4
Step 4: Check continuity of control wiring from module to pump connector
5
Step 5: Command pump activation with scan tool and monitor voltage at pump connector
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The hybrid battery pack coolant pump control circuit has an open condition, meaning no electrical continuity exists between the control module and the pump. The pump cannot be controlled or energized due to this break in the circuit.
The most common cause of P0C47 (Hybrid Battery Pack Coolant Pump Control Circuit/Open) is: Broken or disconnected wiring between control module and coolant pump
Typical repair costs for P0C47 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Without coolant circulation, the hybrid battery will overheat rapidly under use. Vehicle will enter reduced power mode or shut down to prevent battery damage, potentially leaving you stranded.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C47 to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid Battery Cooling System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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