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2021 FORD F-150
3.5L V6 EcoBoost•4WD•AUTOMATIC•gas•turbo
29 active safety recalls on this vehicle — view recalls
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Repairs423Labor507Torque5407Fluid10DTC1156Battery1Maintenance0Recalls29
B1232high severityBody

Antenna/Transceiver Circuit Short to Ground

on 2021 Ford F-150 3.5L V6 EcoBoost · 4WD

What this code means

The immobilizer antenna or transceiver circuit is shorted to ground. This stops the system from reading the key transponder.

Symptoms

  • Engine no-start
  • Security light on
  • Key not recognized

Common causes

  • Shorted antenna wiring
  • Faulty transceiver ring
  • Chafed harness to ground
  • Corroded connector

Diagnostic steps

  1. Scan for B1232
  2. Inspect antenna circuit for short to ground
  3. Measure circuit resistance to ground
  4. Repair wiring or replace transceiver
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🔧 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.
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