U0258 code meaning
Lost Communication With Radio Transceiver
What U0258 means
Despite its name this unit has nothing to do with the audio tuner: Ford's radio transceiver module (RTM) handles the wireless link to keys and remote accessories. On the 2021-2022 Bronco Sport, Ford traced No Key Detected messages to blocked key frequencies or a flat key battery and advised laying the key in the forward console tray, the backup position close to the RTM (SSM 50341); RTMs in recent F-150 and Super Duty trucks work on a changed frequency, so only one accessory keypad part fits (SSM 54546). No manufacturer documents U0258 itself publicly, nor a timeout. A receiver such as the body control module would set it when RTM messages stop on the bus. Keyless entry, key detection at start-up or remote functions may then fail; corrupt RTM data are U0559, a remote start module is U0254.
U0258 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 U0258
- No Key Detected or key not recognized at start-up
- Keyless entry, remote locking or keypad without function
Common causes of U0258
- Most likelyTransceiver without power or ground, or loose connector
- PossibleOpen or shorted data line between transceiver and its master module
- PossibleTransceiver software or configuration not matching after replacement
- Less likelyInternal failure of the radio transceiver
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Radio transceiverVehicle bus wiring
What each part of U0258 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 58 | The exact fault in that area. |
What to do next
- Note U0258 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 U0258
What does U0258 mean?
U0258 means "Lost Communication With Radio Transceiver". Despite its name this unit has nothing to do with the audio tuner: Ford's radio transceiver module (RTM) handles the wireless link to keys and remote accessories. It is a generic code, so it means the same on every make.
Is it safe to drive with U0258?
U0258 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0258 fail an emissions test?
U0258 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 U0258 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0258 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.