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 U0122 on the 2019 Subaru Ascent: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: U0122 are shown. Show all
| 11-190-19R | 2019-05-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE. This bulletin announces availability of ECM reprogramming files to optimize the ECM. This bulletin announces availability of ECM reprogramming files to optimize the ECM. The new files contain logic which will revise: (1) the ECM detection of DTC U0122; (2) the EGR flow rate to address a limited number of customer concerns about a slight hesitation felt while driving at highway speeds and using the cruise control. |
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| 11-190-19 | 2019-03-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). This bulletin announces availability of ECM reprogramming files to optimize the ECM. The new files contain logic which will revise: ? the ECM detection of DTC U0122 ? the EGR flow rate to address a limited number of customer concerns about a slight hesitation felt while driving at highway speeds and using the cruise control. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.