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 found that the pump used to check for fuel tank leaks is using too much power, which might mean something is wrong.
The P1447 code indicates that the Diagnostic Module Tank Leakage (DM TL) pump is drawing more current than expected during the solenoid test. This suggests a potential issue with the pump or its circuit.
The DM TL system is responsible for checking the fuel system for leaks. During the test, the pump should draw a specific amount of current. If the current is too high, it may indicate a problem with the pump, such as a blockage or a short circuit.
• Check Engine Light is on
• Failed emissions test
• Noticeable fuel odor
• Faulty DM TL pump
• Blocked or restricted vent line
• Electrical short in the pump circuit
DM TL: Diagnostic Module Tank Leakage
OBD-II: On-Board Diagnostics, Second Generation
• Check for any stored codes and freeze frame data.
• Inspect the DM TL pump and related wiring for damage or corrosion.
• Test the DM TL pump for proper operation and current draw.
• Replace the DM TL pump if faulty.
• Clear any blockages in the vent line.
• Repair or replace damaged wiring or connectors.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regularly inspect the fuel system for leaks.
• Ensure proper maintenance of the vehicle's electrical system.
• Use quality fuel to prevent clogging.
Emissions Control
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional.
• Avoid driving with a full tank until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code is commonly associated with BMW vehicles and is part of the emissions control system.
Moderate – It affects emissions and may lead to further issues if ignored.
Driving with this code may result in failing an emissions test, which can be illegal in some regions.
• Engine at operating temperature
• Fuel tank between 15% and 85% full
The DM TL pump is typically located near the fuel tank or in the rear of the vehicle.
Q: Can I drive with a P1447 code?
A: While the vehicle may still drive, it's best to address the issue to avoid failing emissions tests and potential further damage.
Q: How can I clear the P1447 code?
A: The code can be cleared with an OBD-II scanner after the issue is fixed, but it may return if the problem persists.
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