Back to 2011 Lincoln MKX
Help
2011 LINCOLN MKX
3.7L V6•AWD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor957Torque6412Fluid16DTC2254Battery2Maintenance0Recalls3
P1703moderate severityPowertrain

Brake Switch Out of Self-Test Range

on 2011 Lincoln MKX 3.7L V6 · AWD

What this code means

The brake switch signal is not within the expected range during the KOER self-test. The brake switch signal is used by the transmission for torque converter clutch disengagement and cruise control operation.

Symptoms

  • Check Engine Light
  • Cruise control inoperative
  • TCC may not disengage when braking
  • Brake lights may not work
  • Shift interlock may not release

Common causes

  • Brake switch out of adjustment
  • Faulty brake switch
  • Brake pedal not pressed during self-test
  • Wiring issue

Diagnostic steps

  1. Press and release brake pedal during KOER self-test
  2. Test brake switch operation (should change state when pedal is pressed)
  3. Check brake light operation
  4. Inspect brake switch wiring

Repair notes

Adjust or replace brake switch. Press brake during self-test.

🔌 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 Powertrain 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 2011 Lincoln MKX 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 Lincoln MKX — $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 →