BMW DTC P1442 – Leakage Diagnostic Pump Control Circuit Low
DTC P1442 meaning on BMW
DTC P1442 on a BMW indicates a fault in the Leakage Diagnostic Pump Control Circuit, specifically a low voltage condition. The Leakage Diagnostic Pump is responsible for maintaining the proper pressure in the fuel tank and evaporative emissions system. When this code is triggered, it means that the control circuit for the pump is not functioning within the expected voltage range.
BMW DTC P1442 symptoms
Symptoms of DTC P1442 on a BMW may include:
- Check Engine Light illuminated
- Decreased fuel efficiency
- Strong fuel odor near the vehicle
- Issues with passing emissions tests
BMW DTC P1442 causes
The common causes of DTC P1442 on a BMW include:
- Faulty Leakage Diagnostic Pump
- Wiring or connector issues in the control circuit
- Corrosion or damage to the pump or related components
BMW DTC P1442 seriousness
While DTC P1442 may not cause immediate drivability issues, it is important to address this code promptly. Ignoring this fault can lead to increased emissions, potential fuel leaks, and may cause the vehicle to fail emissions tests.
How to diagnose DTC P1442 on BMW
To diagnose DTC P1442 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the Leakage Diagnostic Pump and related components for any visible damage
- Check the wiring and connectors in the control circuit for any signs of wear or corrosion
- Test the pump’s functionality and voltage readings
How to fix DTC P1442 on BMW
To fix DTC P1442 on a BMW, the following steps may be taken:
- Replace the faulty Leakage Diagnostic Pump if it is determined to be the cause
- Repair or replace any damaged wiring or connectors in the control circuit
- Clean or replace any corroded components
- Clear the fault code and perform a test drive to ensure the issue is resolved
How to erase DTC P1442 on BMW
To erase DTC P1442 on a BMW, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made, the code can be reset, and the vehicle can be driven to ensure the fault does not reoccur.
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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