BMW DTC P240D – Alternative Fuel Low Pressure System Leak
DTC P240D meaning on BMW
The DTC P240D code on a BMW indicates a low-pressure leak in the alternative fuel system. This system is responsible for managing the fuel pressure in vehicles that run on alternative fuels such as CNG (compressed natural gas) or LPG (liquefied petroleum gas).
BMW DTC P240D symptoms
Symptoms of the DTC P240D code on a BMW may include decreased fuel efficiency, rough idling, difficulty starting the vehicle, and potentially a noticeable fuel odor. In some cases, the check engine light may also illuminate on the dashboard.
BMW DTC P240D causes
The most common causes of the DTC P240D code on a BMW are leaks in the low-pressure system components such as hoses, fittings, or the fuel pressure regulator. These leaks can lead to a drop in fuel pressure, affecting the performance of the vehicle.
BMW DTC P240D seriousness
While the DTC P240D code may not cause immediate harm to the vehicle, it can lead to decreased fuel efficiency and performance if left unresolved. Additionally, prolonged driving with a low-pressure fuel system leak can potentially cause damage to other engine components over time.
How to diagnose DTC P240D on BMW
To diagnose the DTC P240D code on a BMW, a mechanic would typically start by using a scan tool to retrieve the specific fault code. They would then inspect the low-pressure fuel system components for any visible leaks or damage. Pressure testing the system may also be necessary to pinpoint the exact location of the leak.
How to fix DTC P240D on BMW
Fixing the DTC P240D code on a BMW usually involves repairing or replacing the components causing the low-pressure fuel system leak. This may include replacing damaged hoses, fittings, or the fuel pressure regulator. Once the repairs are completed, the system should be tested to ensure that the leak has been resolved.
How to erase DTC P240D on BMW
After fixing the issue causing the DTC P240D code on a BMW, the code can be erased using a scan tool. This tool can clear the fault code from the vehicle’s computer system, resetting the check engine light. It is important to verify that the repair was successful and that the code does not reappear after clearing it.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.