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U0298: Lost Communication With DC/DC Converter Control Module A

Severity
Medium
System
Manufacturer-Specific Network
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does U0298 Mean?

U0298 is a diagnostic trouble code indicating: Lost Communication With DC/DC Converter Control Module A. This code relates to the manufacturer-specific network system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of U0298

Common Causes

Frequently Asked Questions

What does U0298 mean?
U0298 indicates: Lost Communication With DC/DC Converter Control Module A. The vehicle's computer has detected that the DC/DC Converter Control Module A is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code U0298?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U0298 for extended periods may cause additional problems.
How much does it cost to fix U0298?
Repair costs for U0298 typically range from $80 to $1200, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect CAN bus wiring to DC/DC Converter Control Module A for damage
  • 🔧 Check power and ground supply to DC/DC Converter Control Module A
  • 🔧 Replace failed DC/DC Converter Control Module A
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U0200 Lost Communication With Door Control Module B U0201 Lost Communication With Door Control Module C U0202 Lost Communication With Door Control Module D U0203 Lost Communication With Door Control Module E U0204 Lost Communication With Door Control Module F U0205 Lost Communication With Door Control Module G U0206 Lost Communication With Folding Top Control Module U0207 Lost Communication With Moveable Roof Control Module A U0208 Lost Communication With Seat Control Module A U0209 Lost Communication With Seat Control Module B