28a0-bmw

A persistent check engine light (CEL) or drivetrain malfunction warning. Common Causes & Solutions

: Check for carbon build-up or dirt within the throttle body that might prevent proper valve movement. 28a0-bmw

Experts on platforms like JustAnswer recommend checking for additional misfire codes (like P0300-P0306) which often accompany 28A0 when a vacuum leak is present. A persistent check engine light (CEL) or drivetrain