Subaru WRX 2018 — technical service bulletin
Bulletin 11-178-18 · NHTSA communication 10130276 · issued Jan 30, 2018
Technical service bulletin
communication type
Steering
component
2018
model years
1
vehicle entries
Official summary
6MT MODELS ONLY. This bulletin announces availability of ECM reprogramming files to optimize the ECM with improved diagnostic logic for DTC P0852 (Park/Neutral Switch Input Circuit High) detection. If the shifter is moved too fast, the gear change may not be properly detected by the ECM causing the P0852 to set.
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.