Solving P0446 on Your 2024 BMW 5 Series
A P0446 code on your 2024 BMW 5 Series (G60) points to an EVAP vent control circuit malfunction. The all-new eighth-generation 5 Series features the B48 2.0L turbo (530i) or B58 3.0L turbo (540i), with BMW's DME detecting a fault in the fuel tank vent valve (FTVV) circuit.
As a brand-new vehicle under full BMW warranty, this is a dealer repair at no cost. The redesigned G60 platform may have first-year calibration refinements that a software update can resolve.
What You've Noticed
- Check engine light (yellow) with P0446
- Fuel filling difficulties
- EVAP readiness monitor incomplete
- Possible companion codes in DME
Likely Causes
- Fuel Tank Vent Valve Defect (High Likelihood): Manufacturing variation in the FTVV assembly. Primary P0446 component on all BMW models. Warranty-covered.
- DME Software Calibration (High Likelihood): First-year G60 platform — EVAP monitoring parameters may need refinement. DME reflash resolves this. Warranty-covered.
- Leak Diagnosis Pump Issue (Medium Likelihood): New-platform LDP may have early production variations. Warranty-covered.
- EVAP Circuit Wiring (Medium Likelihood): Factory connector or wiring routing issue in the new G60 underbody layout. Warranty-covered.
- Fuel Tank Pressure Sensor (Low Likelihood): Sensor calibration issue on the new platform. Warranty-covered.
What to Do
Take your 5 Series to a BMW dealer. Under warranty, ISTA+ diagnostics, software updates, and any component replacements are free. The G60's new architecture means dealer-level diagnostics are essential.
Full Warranty
Your 2024 5 Series is covered by BMW's 4-year/50,000-mile warranty and the federal emissions warranty (8 years/80,000 miles). All EVAP repairs are free.
Safe to Drive?
Yes. P0446 doesn't affect your 5 Series' turbocharged engine, ZF 8-speed automatic, xDrive, or any driving systems. Full performance is maintained.