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 pump that helps cool the car's computer is spinning too fast or has air bubbles in it, which can cause problems.
The P2D06 code is triggered when the motor electronics coolant pump B is detected to be operating at an excessive speed or there is air trapped in the cooling system.
The motor electronics coolant pump B is responsible for circulating coolant to maintain optimal temperature for electronic components. An overspeed condition may indicate a malfunction in the pump or a restriction in the coolant flow. Air in the system can cause cavitation, reducing the pump's efficiency and leading to potential overheating.
• Check engine light on
• Overheating of electronic components
• Unusual noise from the coolant pump
• Faulty coolant pump
• Air trapped in the coolant system
• Blocked or restricted coolant lines
Coolant: A fluid that circulates through a vehicle's cooling system to absorb and dissipate heat.
Cavitation: The formation of vapor cavities in a liquid, which can cause damage to a pump.
• Check for air in the coolant system and bleed if necessary.
• Inspect the coolant pump for proper operation.
• Check coolant lines for blockages or restrictions.
• Bleed the coolant system to remove air.
• Replace the faulty coolant pump.
• Clear any blockages in the coolant lines.
• Coolant system pressure tester
• Wrench set
• Coolant bleeder kit
$150 - $400
Moderate
• BMW 3 Series
• Audi A4
• Mercedes-Benz C-Class
• Regularly check coolant levels.
• Ensure coolant system is properly bled after maintenance.
• Inspect coolant pump during routine maintenance.
Cooling System Issue
• Do not ignore the check engine light.
• Seek professional diagnosis if unsure.
• Regular maintenance can prevent such issues.
Check with your vehicle manufacturer for specific warranty coverage on cooling system components.
This code has been associated with vehicles that have complex electronic cooling systems, often seen in European models.
Moderate – Addressing this issue promptly can prevent overheating and potential damage to electronic components.
Ignoring this code can lead to overheating, which may cause damage to the vehicle's electronics and increase repair costs.
• Engine at operating temperature
• Coolant system fully pressurized
The motor electronics coolant pump B is typically located near the vehicle's electronic control modules, often in the engine bay.
Q: Can I drive with a P2D06 code?
A: It's not recommended to drive for long periods with this code, as it can lead to overheating of electronic components.
Q: How do I know if my coolant pump is faulty?
A: Listen for unusual noises from the pump and check for overheating issues or leaks.
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