SureTrack Community Fix: Gassy Bimmer

When you smell fuel in the vehicle it can be hard to track down the source. You first look for fuel leaks and then go after the evaporative emissions systems. SureTrack community member SalemAutoLLC had a BMW X5 in the shop that would intermittently have a strong fuel smell inside and also a code P2402. They posed the question to the community, and with the help of fellow community members ericsautomotive, BMWTECH and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

Vehicle
2011 BMW X5 M 4.4L

Title
Fuel smell in vehicle, code P2402, replaced DMTL.

Complaint
Customer complains of strong fuel smell inside vehicle.

Diagnostic Steps Performed/Parts Replaced
Car is showing code 2402, Evaporative Emission System Leak Detection Pump Control Circuit High. Smell of fuel is strong in vehicle, not sure if related. No fuel leaks found. Replaced low side fuel pressure sensor (due to another code), front cowl piece is missing, may be related to fuel smell in cabin. Checked fuel line along drivers side of engine, couldn’t see any signs of moisture or leakage. What is the most likely cause of this code? We’re having a difficult time finding information on this code. Is it possible the leak detection pump is just bad? To be clear, when the check engine light is cleared the problem is gone. As soon as the check engine light comes on, the fuel odor reappears, which leads me to believe it’s not an actual fuel leakage problem.

Best Answer from Community Member ericsautomotive
Do some testing on the LDP as it does sound like the issue.

Cause
DMTL, Diagnostic Module for fuel Tank Leakage, was bad causing the fuel smell.

Correction
Replaced DMTL. Road tested vehicle and fuel smell is gone and code does not come back.