Invalid Data from Radio Transceiver Module
Diagnostic trouble code U0559 indicates that the powertrain control module (PCM) or network gateway has received invalid or erroneous data from the radio transceiver module. Per SAE J2012 standards for network communication codes (U-class), this fault means physical communication on the data bus is present, but data integrity is compromised due to format errors, checksum failures, or data values outside expected ranges. This error typically arises from intermittent data corruption or an internal processing fault within the radio module, rather than a complete CAN bus disconnection. The system invalidates the data frame to prevent erratic behavior in interconnected systems like infotainment or telemetry.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Internal failure in the radio transceiver module (corrupt processor or memory)
- Electromagnetic interference (EMI) on the communication bus wiring
- Low voltage supply to the radio module (weak battery or voltage regulator fault)
- Corrosion or high resistance at the radio module connector pins
- Corrupt software update or firmware incompatibility in the transceiver module
- Short to ground or voltage on the CAN High or CAN Low communication wires to the radio
3. Symptoms You Will Notice
- Infotainment system malfunctions or freezes
- Loss of radio or audio functions
- Intermittent communication errors with telematics or navigation
- Check Engine Light or other warning lights may illuminate
4. Step-by-Step Diagnosis
Scan for all stored codes and freeze frame data to confirm U0559 and related codes
Inspect the radio module connector for corrosion, bent pins, or poor contact
Check battery voltage and charging system; verify voltage at the radio module
Test CAN bus wiring (CAN High and CAN Low) for shorts, opens, or high resistance
Check for technical service bulletins (TSBs) regarding radio module firmware updates
If all wiring and voltage checks pass, attempt to reflash or replace the radio transceiver module
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive as this code indicates a low-severity communication issue. However, infotainment and related systems may not function properly.
How much does it cost to fix?▼
Diagnosis typically costs $100-$150. Repair costs vary: a software update may be $100-$200, while replacing the radio module can range from $300 to $800 or more, depending on the vehicle.