Service bulletins for the 2019 Subaru Ascent
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
638 on file from NHTSA, as of 2026-10-19.
About P0045 on the 2019 Subaru Ascent: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
By topic
Only bulletins with trouble code: P0045 are shown. Show all
| 11-183-18R | 2019-02-25. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045: |
|---|---|
| 11-183-18R | 2018-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045: TURBOCHARGER / SUPERCHARGER BOOST CONTROL ?A? CIRCUIT OPEN and DTC P2196: A/F O2 SENSOR SIGNAL BIASED / STUCK RICH BANK 1 SENSOR 1. For P0045, in some cases, an engine RPM drop may occur when selecting D or R range too quickly following ignition on and before the engine reaches full operation during the ECM?s initial control of the waste gate valve. Should this occur P0045 may set the next time the engine is started. For P2196, if the driver "snaps" the throttle open and shut rapidly, normal judgement of the A/F sensor data may be inaccurate and cause the code to be detected in error. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.