U0498: Invalid Data from Telephone Control Module
The U0498 code indicates that a receiving control module (typically the gateway or infotainment module) has detected invalid, erratic, or out-of-range data from the Telephone Control Module (Bluetooth/hands-free) over the vehicle's communication bus (CAN, LIN, FlexRay, etc.). While physical communication is present, the data integrity—such as checksum, message counter, or logical values—has failed.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty Telephone Control Module (Bluetooth/hands-free) internal failure
- Open, shorted, or corroded wiring or connectors in the telephone module's communication bus
- Software error or firmware corruption in the telephone module or receiving module
- Low battery voltage or voltage spikes corrupting data transmission
- Faulty Gateway module misinterpreting valid data
3. Symptoms You Will Notice
- Bluetooth or hands-free system not working or intermittent
- Infotainment system freezing, rebooting, or displaying communication errors
4. Step-by-Step Diagnosis
Scan for all codes and note any related U-codes or communication faults
Inspect wiring and connectors at the Telephone Control Module for damage, corrosion, or loose pins
Check battery voltage and charging system for stable power (12.6V+ engine off, 13.5-14.5V running)
Perform a module communication test using a scan tool to verify data integrity
If wiring and power are good, attempt to reprogram or update the Telephone Control Module and receiving module firmware
If the issue persists, replace the Telephone Control Module and re-test
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive. The code affects only the telephone and infotainment systems, not critical drivetrain or safety systems. However, you may lose hands-free calling and audio functions.
How much does it cost to fix?▼
Diagnosis typically costs $100-$150. If the Telephone Control Module needs replacement, parts and labor range from $300 to $800 depending on vehicle make and module location. Software updates may cost $100-$200.