Service bulletins for the 2018 Subaru WRX
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.
368 on file from NHTSA, as of 2026-10-19.
About C1956 on the 2018 Subaru WRX: what the code means, and the bulletins and recalls about the same components.
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By component
By trouble code
Only bulletins with trouble code: C1956 are shown. Show all
| 18-244-26 | 2026-10-05. Service bulletin. ELECTRICAL SYSTEM. "This Bulletin announces additional troubleshooting steps for the following DTCs: DTC C1956: RH Actuator Circuit DTC C1957: LH Actuator Circuit" |
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| 06-63-18R | 2018-08-20. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces a design change to the EPB adapter cord harness connector. In some cases, the retaining tab of the connector may become damaged as a result of removal or installation for diagnosis and later and cause DTC C1956 or C1957 to set and the brake warning lamp to illuminate. The retaining tab portion of the connector has been changed to improve its durability and prevent recurrence of the DTC. If there is no prior history of disconnection and the connector lock tab is not damaged, check for another possible cause for these DTCs. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.