Network, generic

U0500 Invalid Data Received From Communication Module

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

The public code lists checked do not carry U0500 at all, so neither its status as a generic code nor its wording can be confirmed. In the generic numbering, an invalid-data code usually mirrors the lost-communication code of the same module 0x301 lower (U0200 to U0501, U0199 to U049A); for U0500 that partner would be U01FF, which is not assigned in those lists either, so a reserved slot is likely. No manufacturer bulletin found uses U0500. If a tool shows it, read the make-specific meaning first. By analogy only: a telematics unit links the car to mobile networks for remote and emergency services, and invalid frames from it would disable those services without affecting the engine; the defined code for that unit is U0499.

Likely causes

Code read with a manufacturer-specific definition that differs from the generic list

Scan tool decoding the stored fault number incorrectly

Telematics or communication unit sending corrupted frames (analogy to U0499)

Symptoms

Code present without any noticeable fault
Remote app, emergency call or online services unavailable (if it concerns the telematics unit)

Repair estimate

DifficultyHardWorkshop 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

communication modulecan bus wiring

Related codes

U0499 U0198 U0400

References: law.cornell.edu, en.wikipedia.org, saabwisonline.com.