U0449

Invalid Data Received From Serial Data Gateway Module C

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine Light Is On
Failure of some systems (climate control, multimedia)
Information display malfunctions
Errors in other vehicle systems

Causes

Problems with the C module software
Open or short circuit in the communication circuit
Module C itself is faulty
Module power problems
Corrosion of contacts in connectors

How to Fix

CAN bus diagnostics using a scanner
Checking the integrity of the wiring harness to module C
Checking module power and grounding
Flashing or replacing module C
Cleaning contacts in connectors

Related codes

U0448 U0450 U0451