Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is saying the pump that moves the engine's cooling liquid doesn't have enough power to work properly.
The P15D5 code indicates that the voltage supplied to the coolant pump is below the expected range, which can affect the pump's operation.
The coolant pump is responsible for circulating coolant throughout the engine to maintain optimal temperature. When the PCM (Powertrain Control Module) detects that the voltage supplied to the coolant pump is below the threshold, it triggers the P15D5 code. This could be due to electrical issues such as a weak battery, poor connections, or a failing pump.
• Engine overheating
• Check engine light on
• Reduced engine performance
• Unusual noises from the engine compartment
• Weak or failing battery
• Poor electrical connections
• Faulty coolant pump
• Wiring issues
• Faulty PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check battery voltage and condition.
• Inspect electrical connections to the coolant pump.
• Test the coolant pump for proper operation.
• Examine wiring for any signs of damage or corrosion.
• Check PCM for any faults.
• Replace or recharge the battery if necessary.
• Repair or replace faulty wiring or connections.
• Replace the coolant pump if it is not functioning properly.
• Reprogram or replace the PCM if needed.
• Multimeter
• OBD-II scanner
• Wrench set
$150 - $500
Moderate
• Chevrolet Malibu
• Buick Regal
• Cadillac ATS
• Regularly check battery health.
• Inspect electrical connections periodically.
• Ensure coolant levels are maintained.
Electrical Issue
• Avoid driving the vehicle if it's overheating.
• Get the vehicle inspected by a professional as soon as possible.
Check with your vehicle manufacturer for warranty coverage on electrical components.
The P15D5 code has been reported in vehicles with electrical system issues, particularly those with aging batteries or poor maintenance.
High – This issue can lead to engine overheating, which can cause severe engine damage if not addressed promptly.
Driving with an overheated engine can be dangerous and may violate vehicle safety regulations.
• Engine running
• Coolant system fully operational
The coolant pump is typically located near the front of the engine, connected to the engine block.
Q: Can I drive my car with a P15D5 code?
A: It's not recommended to drive with this code active, as it can lead to overheating and engine damage.
Q: How can I prevent a P15D5 code?
A: Regular maintenance of the electrical system and coolant pump can help prevent this code.
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