U0254Lost Communication With Remote Start Module
- Generic OBD-II code · Network
- How the car detects it
- A remote start module runs the engine from a key fob or app so the cabin can be heated or cooled before departure. GM's list for the 2011 Saab 9-5 treats it as a network node of its own under U0254. Subaru documents the code for 2020 Legacy and Outback models with the genuine accessory Remote Engine Starter: the central gateway stored U0254 during an all-systems check because of a software interface mismatch between gateway and starter, although the accessory worked normally. The bulletin allows ignoring the code on its own, and later replacement starter units carry revised U0254 logic (15-258-19, revised as 15-258-19R). With a real fault the starter is unpowered, unplugged or defective, so remote start fails while normal driving is unaffected. Corrupt frames from it are U0555.
- What you may notice
- Remote start does not work or stops after a short time
- Code found only during a full system scan, no other complaint
- Likely causes
- LikelySoftware interface mismatch between gateway and accessory starter (Subaru), no real fault
- PossiblePoor installation, loose connector or missing supply of an accessory or aftermarket starter
- PossibleStarter removed or disconnected while the vehicle configuration still expects it
- RareInternal failure of the remote start module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.