U0559 code meaning
Invalid Data Received From Radio Transceiver
What U0559 means
Despite the name, the radio transceiver is not the audio tuner but the module that exchanges radio signals with keys and wireless accessories. Ford's name is RTM: on 2021–2022 Bronco Sport, jammed passive-key frequencies or a weak key battery could trigger No Key Detected, solved by placing the key in the console backup spot close to the RTM (SSM 50341); on recent F-150 and Super Duty trucks the RTM uses a new frequency, so only one specific accessory keypad pairs (SSM 54546). Keyless systems commonly work at 315 or 433.92 MHz. U0559 means the RTM's messages arrive but are invalid; U0258 means none arrive. No bulletin names U0559. Keyless entry, remote functions or key detection may fail.
U0559 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0559
- No Key Detected or similar key message in the cluster
- Keyless entry or remote functions work poorly or not at all
- Wireless keypad cannot be paired
Common causes of U0559
- PossibleRadio interference or weak key battery producing implausible receiver data
- PossibleAccessory keypad or remote on a frequency the transceiver does not support
- PossibleTransceiver software or configuration fault
- Less likelyRadio transceiver module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Radio transceiver
What each part of U0559 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 59 | The exact fault in that area. |
What to do next
- Note U0559 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0559
What does U0559 mean?
U0559 means "Invalid Data Received From Radio Transceiver". Despite the name, the radio transceiver is not the audio tuner but the module that exchanges radio signals with keys and wireless accessories. It is a generic code, so it means the same on every make.
Is it safe to drive with U0559?
U0559 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0559 fail an emissions test?
U0559 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0559 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0559 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.