2008 BMW P0440: What It Means & Is It Safe to Drive?
P0440 on the 2008 BMW: Evaporative Emission System Control System Malfunction. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
A general fault in the EVAP system—could be a leak, stuck valve, or sensor issue.
Common causes on the 2008 BMW
- Gas cap loose or faulty
- Purge or vent valve stuck
- Charcoal canister or hose leak
Symptoms
- Check Engine Light
Typical fixes
- Replace gas cap
- Test purge/vent valves
- Smoke test EVAP system
Repair cost range
For a 2008 BMW, repairs for P0440 typically fall between $20 and $400, depending on the root cause and labor rates in your area.
Known issues on BMW
BMW EVAP codes often trace to a failed DMTL pump or a cracked vacuum line. The DMTL is BMW-specific—confirm it's faulty before replacing. Use the ISTA diagnostic routine first as aftermarket smoke testers may not pressurize the BMW system correctly.
Most commonly affected models
325i E46 2001–2005530i E60 2004–2007X5 E53 2000–2006