P1443 – BMW DTC

BMW DTC P1443 – Leakage Diagnostic Pump Control Circuit High

DTC P1443 meaning on BMW

DTC P1443 on a BMW indicates a fault with the Leakage Diagnostic Pump Control Circuit. This code is triggered when the control module detects a high voltage condition in the circuit that controls the operation of the leakage diagnostic pump.

BMW DTC P1443 symptoms

Symptoms of DTC P1443 on a BMW may include:

• Check Engine Light illuminated
• Increased fuel consumption
• Reduced engine performance
• Visible fuel leaks

BMW DTC P1443 causes

Common causes of DTC P1443 on a BMW include:

• Faulty Leakage Diagnostic Pump
• Wiring or connector issues in the control circuit
• Defective control module

BMW DTC P1443 seriousness

While DTC P1443 may not cause immediate drivability issues, it should not be ignored. Ignoring this fault can lead to increased emissions, reduced fuel efficiency, and potential damage to other engine components over time.

How to diagnose DTC P1443 on BMW

To diagnose DTC P1443 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors in the Leakage Diagnostic Pump Control Circuit
3. Test the Leakage Diagnostic Pump for proper operation
4. Check the control module for any faults

How to fix DTC P1443 on BMW

To fix DTC P1443 on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connectors in the control circuit
2. Replace the Leakage Diagnostic Pump if it is found to be faulty
3. If the control module is defective, it may need to be replaced or reprogrammed

How to erase DTC P1443 on BMW

To erase DTC P1443 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been completed, the code can be cleared to reset the Check Engine Light and monitor the system for any recurring issues.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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