Network, generic

U0555 Invalid Data Received From Remote Start Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

A remote start module lets the engine run from a key fob or app for heating or cooling and must work around the immobilizer while doing so; it may be a factory part, a dealer accessory or an aftermarket box tied into the CAN network. GM lists the remote start module as its own node (Saab 9-5 2011: U0254). Subaru shows how a mismatch in the interface between gateway and its accessory Remote Engine Starter set U0254 on the 2020 Legacy/Outback without any effect on function, cured by revised modules (15-258-19R). Mercedes warns that aftermarket remote start and other CAN devices on Sprinter and Metris can cause communication faults and failed programming. U0555 means frames come in but are invalid; U0254 means none arrive. No bulletin names U0555. Remote start may fail or nothing is noticeable.

Likely causes

Aftermarket remote starter or other add-on device on the CAN bus sending non-conforming messages
Software of the remote start module not matching the vehicle gateway
Poor splices or connectors from the remote starter installation

Symptoms

  • Engine does not start or shuts down again when started remotely
  • Code found during an all-systems scan with no noticeable fault
  • Module programming at the workshop does not complete

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–500
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

remote start module

Related codes

U0254

References: static.nhtsa.gov, static.nhtsa.gov, saabwisonline.com, en.wikipedia.org.