U0559: Invalid Data Received From Radio Transceiver
What to do
The car drives normally. What you may notice is poor radio reception — but check two other things before assuming it is just the radio.
Does your keyless entry still work reliably, and are the tyre pressure warnings behaving? On most cars those receivers share a module with the radio, so all three failing together is one fault, not three — and saying that to whoever diagnoses it saves real time.
Mention any recent work on the roof lining, the tailgate or the rear screen. The antenna module lives in one of those places, and a coaxial connector left not quite pushed home is the usual cause.
Check the roof fin and the rear screen mounting for water ingress, too — the module sits directly under them, and a perished seal puts water straight onto it.
What this code means
The radio transceiver is broadcasting data that cannot be accepted as true. See U0400 for what an invalid-data code is and why the module it names is usually the messenger rather than the culprit.
A transceiver both sends and receives, which is what separates this from an ordinary radio tuner — and it is why the module matters beyond entertainment.
On most vehicles this covers the antenna module and the radio front end, and on many it is the same assembly carrying keyless entry reception, tyre pressure sensor reception, and sometimes the digital broadcast and telephone antennas. One module, several unrelated-looking functions.
Which gives the diagnostic signature worth recognising: radio reception, keyless entry and tyre pressure warnings failing together. Three symptoms, one cause, and an owner who reports them as three faults.
Antenna connections are the physical cause. These modules live at the top of the rear screen, in the roof fin, or behind headlining — and they are disturbed by every headlining, tailgate or screen repair. A coaxial connector not fully seated is the classic, and it produces exactly the kind of implausible signal-quality data this code names.
Water reaches them too, since a roof fin or a rear-screen mounting is on the outside of the car by definition, and a failed seal is directly above the module.
Likely causes
Start here
- Corroded or loose connector · easy
- Damaged data bus wiring · moderate
- GPS antenna disconnected or damaged · moderate
Less common
- Module not coded to the vehicle · specialist
- Water ingress into module · moderate
- Damaged wiring harness · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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