BMW 230I 2016–2017 — technical service bulletin
Bulletin B121017 · NHTSA communication 10149230 · issued May 1, 2017
Technical service bulletin
communication type
Engine
component
2016–2017
model years
11
vehicle entries
Official summary
"ENGINE IDLE TOO HIGH AT OPERATING TEMPERATURE. Primarily when vehicle is at altitudes higher than 5000' above sea level, and engine is at operating temperature, the idle is sporadically elevated (up to approx. 1200 rpm). MIL indicator is illuminated. Fault code 1E0001 - ""Idle speed control: Speed too high"" is stored in DME. DME software error"
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.