Back to 2012 Ford Focus
Help
2012 FORD FOCUS
2.0L I4 GDI•FWD•DCT•gas
8 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor496Torque3424Fluid7DTC1137Battery1Maintenance0Recalls8
C0411moderate severityChassis

ACC Radar Module Communication Fault

on 2012 Ford Focus 2.0L I4 GDI · FWD

What this code means

Loss of CAN bus communication with the ACC radar module.

Symptoms

  • ACC disabled
  • Multiple driver assist warnings
  • Forward collision alert unavailable

Common causes

  • CAN wiring fault to radar module
  • Module connector disconnected
  • Radar module power loss
  • CAN bus termination issue at module

Diagnostic steps

  1. Check CAN communication to radar module
  2. Inspect module connector
  3. Verify power and ground at module
  4. Check CAN bus wiring continuity
  5. Look for U-codes related to radar module

Repair notes

Repair CAN bus wiring or connector. Replace module if communication chip has failed.

🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITE
Shop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Chassis codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2012 Ford Focus repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Ford Focus — $99 →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →