U0498: Invalid Data Received From Telephone Control Module

What it means

A control module received invalid data from the telephone control module. The code identifies a data validity fault; the specific affected function depends on the vehicle.

How it works

The telephone control module sends phone and hands-free status data to other modules over the vehicle network. U0498 sets when a receiving module judges data from that telephone module invalid, which can disrupt calling or hands-free features.

Common causes

Most likely first.

1. Fault in the transmitting module
2. Network wiring or connector fault
3. Module power or ground fault
4. Software or configuration mismatch

Symptoms

• Telephone or hands-free functions may not work correctly
• Infotainment warning or related communication codes may appear

How to diagnose it

1. Use a scan tool to record freeze-frame details and see whether U0498 returns, since a temporary network interruption may have triggered it.
2. Check for companion telephone, infotainment, or network codes and note whether hands-free symptoms occur at the same time.
3. Inspect the telephone module's connectors and network wiring for looseness, corrosion, physical damage, or chafing.
4. Check the module's power and ground under the manufacturer's diagnostic procedure, since an unstable supply can corrupt network data.
5. If wiring and supplies are sound, use vehicle-specific module tests and confirm telephone-module software and configuration.

Common fixes

• Reconnect or clean a loose or corroded telephone-module connector.
• Repair damaged network wiring to the telephone module.
• Repair a poor module power or ground connection.
• Apply the correct software update or configuration if specified for the vehicle.
• Replace the telephone control module if testing confirms an internal fault.

Can I keep driving?

Phone or hands-free functions may be unavailable, but this code alone usually does not affect vehicle control. Do not handle or troubleshoot a phone while driving.