Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is saying that the coolant pump, which helps keep the engine cool, is getting too hot.
The P15D6 code indicates that the temperature of the coolant pump has exceeded the threshold set by the manufacturer.
The engine control module (ECM) monitors the temperature of the coolant pump to ensure it operates within a safe range. If the temperature exceeds a predetermined threshold, the ECM triggers the P15D6 code.
• Engine overheating
• Check engine light on
• Reduced engine performance
• Faulty coolant pump
• Blocked coolant passages
• Malfunctioning temperature sensor
Coolant: A liquid used in engines to prevent overheating.
ECM: Engine Control Module, the computer that controls engine functions.
• Check for any visible coolant leaks.
• Inspect the coolant pump for proper operation.
• Test the temperature sensor for accuracy.
• Replace the coolant pump if faulty.
• Clear any blockages in the coolant system.
• Replace the temperature sensor if malfunctioning.
• OBD-II scanner
• Multimeter
• Coolant system pressure tester
$200 - $600
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly check coolant levels.
• Schedule routine maintenance for the cooling system.
• Replace coolant as recommended by the manufacturer.
Engine Performance
• Do not drive the vehicle if the engine is overheating.
• Have the vehicle inspected by a professional as soon as possible.
Check your vehicle's warranty for coverage on cooling system components.
This code has been associated with cooling system issues in various models, often due to component wear over time.
High – An overheating engine can cause severe damage if not addressed promptly.
Operating a vehicle with an overheating engine can be hazardous and may lead to engine failure.
• Engine at operating temperature
• Vehicle stationary
The coolant pump is typically located at the front of the engine, near the radiator.
Q: Can I drive with a P15D6 code?
A: It's not recommended to drive with this code active as it indicates potential overheating, which can damage the engine.
Q: How do I reset the P15D6 code?
A: After addressing the issue, you can use an OBD-II scanner to clear the code. However, ensure the problem is fixed to prevent recurrence.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.