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 cools the air going into the engine is getting too much electricity, so it stops working to protect itself.
The P15E2 code indicates that the charge air cooler coolant pump has been shut off due to an overvoltage condition.
The charge air cooler coolant pump is responsible for circulating coolant to reduce the temperature of the air entering the engine. An overvoltage condition means that the electrical supply to the pump is higher than the specified range, which can cause the pump to shut off to prevent damage.
• Check engine light is on
• Reduced engine performance
• Engine overheating
• Faulty voltage regulator
• Wiring issues such as shorts or open circuits
• Defective charge air cooler coolant pump
Voltage Regulator: A device that maintains a constant voltage level.
Coolant Pump: A pump that circulates coolant to manage engine temperature.
• Check the voltage regulator for proper operation.
• Inspect wiring and connectors for damage or corrosion.
• Test the charge air cooler coolant pump for functionality.
• Replace the faulty voltage regulator.
• Repair or replace damaged wiring and connectors.
• Replace the defective charge air cooler coolant pump.
• Multimeter
• OBD-II scanner
• Wrench set
$150 - $500
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regularly inspect electrical connections.
• Ensure proper maintenance of the vehicle's electrical system.
• Avoid overloading the vehicle's electrical system.
Electrical Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional as soon as possible.
Check with the vehicle manufacturer for warranty coverage on electrical components.
This code has been associated with issues in vehicles with advanced cooling systems, particularly in performance models.
Moderate – Addressing this issue promptly can prevent further damage to the engine.
Driving with a malfunctioning coolant pump can lead to engine overheating, which may cause safety hazards.
• Engine running
• Electrical system under load
The charge air cooler coolant pump is typically located near the front of the vehicle, close to the radiator.
Q: Can I drive with a P15E2 code?
A: It's not recommended to drive for long periods with this code as it can lead to engine overheating.
Q: How do I reset the P15E2 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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