This bulletin announces the diagnostic procedures and availability of reprograming files to rectify the...
Subaru technical service bulletin 09-131-25 for 2015-2021 Subaru WRX STI.
- Bulletin number
- 09-131-25
- Component
- Electrical system
- Summary
- This bulletin announces the diagnostic procedures and availability of reprograming files to rectify the following Diagnostic Trouble Codes (DTCs). The ELCM may accumulate condensation causing the inaccurate detection of P2404. P0420 may become falsely detected due to unstable combustion caused by a downshift. The new reprogramming files contains enhanced software allowing for condensation conditions and downshift rotational speeds be more accurately detected by the Engine Control Module (ECM).
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