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 computer in your car has detected a problem with the electric pump that helps cool the air going into the engine. It's like a fan not working properly to cool down your room.
The P2CAF code indicates that the control circuit for the charge air cooler's secondary coolant pump is experiencing higher than normal voltage, which suggests a potential electrical issue.
The Charge Air Cooler (CAC) is an essential component that cools the air compressed by the turbocharger before it enters the engine. This process increases engine efficiency and performance. The coolant pump B is responsible for circulating coolant through the CAC. A 'Control Circuit High' error suggests that the voltage in the control circuit is above the expected range, possibly due to a short circuit, a faulty pump, or a wiring issue.
• Check Engine Light is on
• Reduced engine performance
• Overheating engine
• Poor fuel efficiency
• Unusual engine noises
• Faulty charge air cooler coolant pump B
• Short circuit in the control wiring
• Faulty relay or fuse
• Corroded or damaged connectors
• ECU malfunction
Charge Air Cooler: A device that cools the air compressed by the turbocharger before it enters the engine.
Coolant Pump: A pump that circulates coolant through the engine to maintain optimal operating temperature.
• Use an OBD-II scanner to confirm the code.
• Visually inspect the coolant pump and wiring for damage.
• Check the pump's electrical connections and voltage.
• Test the relay and fuse associated with the coolant pump.
• Inspect the ECU for any faults.
• Replace the faulty coolant pump.
• Repair or replace damaged wiring or connectors.
• Replace the faulty relay or fuse.
• Reset the ECU and clear the fault code.
• Perform a system test to ensure proper operation.
• OBD-II scanner
• Multimeter
• Basic hand tools
• Replacement parts (pump, wiring, etc.)
$150 - $500
Moderate
• BMW 3 Series
• Ford F-150
• Volkswagen Golf
• Regularly inspect and maintain the cooling system.
• Ensure proper coolant levels and quality.
• Check electrical connections for corrosion or damage.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent engine damage.
• Consult a professional mechanic for diagnosis and repair.
Check with your vehicle manufacturer to see if the coolant pump is covered under warranty.
This code has been reported in vehicles with turbocharged engines where cooling efficiency is critical for performance.
High – This issue can lead to engine overheating and potential damage if not addressed promptly.
Driving with this fault can cause engine damage and may not comply with emissions regulations.
• Engine running
• Coolant system at operating temperature
The charge air cooler coolant pump is typically located near the front of the engine bay, connected to the charge air cooler.
Q: Can I drive with a P2CAF code?
A: It's not recommended to drive with this code active as it can lead to engine overheating and damage.
Q: How can I prevent this issue?
A: Regular maintenance of the cooling system and checking electrical connections can help prevent this issue.
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