Network, generic

U0493 Invalid Data Received From Personal Computer

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0493 covers a personal computer sharing the vehicle network, a slot in the J2012 list that hardly any production car fills. The nearest real case is a fleet or police vehicle with a laptop or mobile data terminal wired into the car: Ford's 2027 Police Interceptor Utility offers an Integrated Computer Screen that mirrors a laptop stowed in the cargo bay, and a Vehicle Integration System that lets upfitters read the J1939 CAN signals. The code is logged when such a computer sends frames whose content a receiving module refuses; total silence would be U0192. No manufacturer documents U0493 publicly, so an aftermarket installation, its interface box or its software is the first suspect. Driving is unaffected and no MIL lights.

Likely causes

Aftermarket computer installation or interface box sending non-conforming frames
Software or configuration of the connected computer
Wiring or connector fault at the vehicle interface

Symptoms

  • Functions of the connected computer that rely on vehicle data fail
  • Often no noticeable fault in the vehicle itself

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–500
Time0.5–3 h

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

Parts involved

on board pc

Related codes

U0192U0499

References: content.fordpro.com, en.wikipedia.org.