What Does P0C48 Mean?
The control module detects abnormally low voltage or current in the hybrid battery coolant pump control circuit. This indicates a short to ground, excessive resistance, or weak signal in the pump control system.
Safety Warning
Inadequate pump operation prevents proper battery cooling, leading to overheating and reduced power mode. Continued operation risks battery damage and potential thermal shutdown while driving.
Common Causes
35%
Short to ground in pump control wiring harness
25%
Partially shorted coolant pump motor windings
20%
High resistance in pump control circuit connections
15%
Failed control module output driver circuit
5%
Corroded ground connection causing voltage drop
Diagnostic Steps
1
Step 1: Disconnect pump connector and check for short to ground in control circuit wiring
2
Step 2: Measure pump motor resistance and compare to specifications for internal shorts
3
Step 3: Check voltage drop across all connectors in pump control circuit
4
Step 4: Inspect wiring harness for chafing, pinching, or damage causing shorts
5
Step 5: Test control module output with pump disconnected to isolate controller vs. pump issue
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
The control module detects abnormally low voltage or current in the hybrid battery coolant pump control circuit. This indicates a short to ground, excessive resistance, or weak signal in the pump control system.
The most common cause of P0C48 (Hybrid Battery Pack Coolant Pump Control Circuit Low) is: Short to ground in pump control wiring harness
Typical repair costs for P0C48 range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Inadequate pump operation prevents proper battery cooling, leading to overheating and reduced power mode. Continued operation risks battery damage and potential thermal shutdown while driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C48 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Hybrid Battery Cooling System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
